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Sandra Ferreira is a faculty member at the University of Beira Interior (UBI), where she holds the position of Assistant Professor in the Department of Mathematics. She is also a member of the Center of Mathematics and Applications at UBI, as well as a collaborator of the Center of Mathematics and Applications at FCT Nova. Sandra Ferreira obtained her doctorate in Mathematics from UBI, and she holds a master's degree in Applied Mathematics from the University of Évora and a bachelor's degree in Mathematics with a specialization in Probability and Statistics. Her research interests lie in the fields of Statistics and Applied Mathematics, particularly in Statistical Inference in Linear Models and the examination of statistical distributions. Sandra Ferreira has contributed to the publication of research in the areas of Probability and Statistics, and she is involved in various research projects. Moreover, she serves as a guest reviewer for international journals and she is a member of the scientific committee for international conferences.
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Identification

Personal identification

Full name
Sandra Ferreira

Citation names

  • Ferreira, Sandra

Author identifiers

Ciência ID
E01A-BAE7-2B14
ORCID iD
0000-0002-9209-7772

Knowledge fields

  • Exact Sciences - Mathematics - Statistics and Probability

Languages

Language Speaking Reading Writing Listening Peer-review
English Intermediate (B1) Intermediate (B1) Intermediate (B1) Intermediate (B1)
French Beginner (A1) Intermediate (B1) Beginner (A1) Beginner (A1)
Education
Degree Classification
2006
Concluded
 Doutoramento em Matemática (Doutoramento)
Universidade da Beira Interior, Portugal
"Inferência para modelos ortogonais com segregação" (THESIS/DISSERTATION)
 Aprovado com unanimidade
2000
Concluded
 Mestrado em Matemática Aplicada (Mestrado)
Universidade de Évora, Portugal
"Análise discriminante, Teoria da decisão e Inferência Bayesiana " (THESIS/DISSERTATION)
 Bom com Distinção
1996
Concluded
 Licenciatura em Matemática (Licenciatura)
Universidade de Évora, Portugal
"Delineamentos regressionais aplicados a quadrados latinos" (THESIS/DISSERTATION)
 n/a
Affiliation

Teaching in Higher Education

Category
Host institution 		Employer
2006/09/01 - Current Assistant Professor (University Teacher) Universidade da Beira Interior, Portugal
2019 - 2022 Invited Assistant Professor (University Teacher) Universidade Aberta, Portugal
2000 - 2006 Assistant (University Teacher) Universidade da Beira Interior, Portugal

Others

Category
Host institution 		Employer
1999/09 - 2000/09 Equiparada a assistente de 1.º Triénio (Matemática) Instituto Politécnico de Santarém, Portugal
1996/09 - 1998/09 Professora do 1.º Grupo (Matemática) Escola Profissional da Região Alentejo, Campo Maior, Portugal
1991/09 - 1992/09 Professora do 1.º Grupo (Matemática) Escola S. António Inácio da Cruz, Grândola, Portugal
Projects

Contract

Designation Funders
2022 - 2027 UNITA — Universitas Montium (ERASMUS-EDU-2023-EUR-UNIV- 101124853
UNITA — Universitas Montium (ERASMUS-EDU-2023-EUR-UNIV)-101124853
Researcher
2025/01/01 - 2026/06/30 Center for Mathematics and Applications
10.54499/UID/PRR/00297/2025
UID/PRR/00297/2025
Universidade Nova de Lisboa, Portugal

Universidade Nova de Lisboa NOVAMath, Portugal

Universidade Nova de Lisboa Associação para a Inovação e Desenvolvimento da FCT, Portugal
Fundação para a Ciência e a Tecnologia
Ongoing
2020/01/01 - 2024/12/31 Centro de Matemática e Aplicações
UIDB/00297/2020
10.54499/UIDB/00297/2020
Universidade Nova de Lisboa, Portugal

Universidade Nova de Lisboa NOVAMath, Portugal

Universidade Nova de Lisboa Associação para a Inovação e Desenvolvimento da FCT, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2020/01/01 - 2024/12/31 Centro de Matemática e Aplicações da Universidade da Beira Interior
UIDB/00212/2020
10.54499/UIDB/00212/2020
Universidade da Beira Interior, Portugal

Universidade da Beira Interior Centro de Matemática e Aplicações, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2020 - 2023 Funding of Strategic Projects with Public Interest promoted by Associated Laboratories and RD Units UIDB /00297/2020
Universidade Nova Centro de Matemática e Aplicações
Researcher
2020 - 2023 Funding of Strategic Projects with Public Interest promoted by Associated Laboratories and RD Units UIDB /00212/2020
UIDB /00212/2020
Researcher
2011/01/01 - 2013/12/31 Projecto Estratégico - UI 297 - 2011-2012
PEst-OE/MAT/UI0297/2011
Universidade Nova de Lisboa Faculdade de Ciências e Tecnologia, Portugal

Universidade Nova de Lisboa NOVAMath, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2011/01/01 - 2013/12/31 Projecto Estratégico - UI 212 - 2011-2012
PEst-OE/MAT/UI0212/2011
Universidade da Beira Interior, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2007/05/14 - 2010/08/13 Modelos Lineares Mistos
PTDC/MAT/69850/2006
Universidade Nova de Lisboa Faculdade de Ciências e Tecnologia, Portugal

Universidade da Beira Interior, Portugal

Universidade de Évora, Portugal

Universidade Nova de Lisboa NOVAMath, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
Outputs

Publications

Book
  1. Ferreira, Sandra. EDUCAÇÃO FÍSICA, LAZER & SAÚDE. Desafios Interdisciplinares na Promoção da atividade Física (Vol. I). 2019.
  2. Ferreira, Sandra. Optimal Estimators in Mixed Models with Orthogonal Block Structures. 2018.
    10.1007/978-3-319-76605-8
Book chapter
  1. Ferreira, Sandra. "Orthogonal Block Structure and Uniformly Best Linear Unbiased Estimators". 2019.
    10.1007/978-3-030-17519-1_8
  2. Ferreira, Sandra. "Estimation in Models with Commutative Orthogonal Block Structure, Imbedded Orthogonality". In Stochastic Modeling, Data Analysis and Statistical Applications, 315. 2015.
    Published
  3. Ferreira, Sandra. "Generalized F Tests in Models with Random Perturbations: The Truncated Normal Case". 2013.
    10.1007/978-3-642-34904-1_32
Conference paper
  1. Patricia Antunes; Sandra Ferreira; Dario Ferreira. "Higher Order Cumulants". 2023.
    10.1145/3613347.3613371
  2. Sandra S. Ferreira, Dário Ferreira, Célia Nunes and João T. Mexia (2022). Optimum estimation and marginal distributions.. "Optimum estimation and marginal distributions". Paper presented in AIP Conference Proceedings, 2022.
  3. Oliveira, Amilcar; Ferreira, Dário; Ferreira, Sandra; Oliveira, Teresa A.. "13th Conference on Statistics, Mathematics and Computation: book of abstracts". 2019.
  4. Ferreira, Sandra. "Orthogonal Fixed Effects ANOVA with Random Sample Sizes". 2018.
  5. Oliveira, Amilcar; Nunes, Célia; Ferreira, Dário; Grilo, Luís M.; Ferreira, Sandra; Oliveira, Teresa. "12th Workshop on Statistics, Mathematics and Computation In Honour of Professor Carlos Braumann: book of abstracts". 2018.
  6. Ferreira, Dário; Ferreira, Sandra S.; Nunes, Célia; Mexia, João T.. "Segregation and intrinsec restrictions on canonic variance components". 2017.
    Published • 10.1063/1.5044064
  7. Ferreira, Dário; Ferreira, Sandra S.; Nunes, Célia; Oliveira, Teresa A.; Mexia, João T.. "Confidence intervals for variance components in gauge capability studies". Paper presented in INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS, 2017.
    10.1063/1.5044172
  8. Ferreira, Sandra S.; Ferreira, Dário; Nunes, Célia; Mexia, João T.. "Estimation of variance components in models with positive commutativity orthogonal block structure". Paper presented in INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS, 2017.
    Published • 10.1063/1.5044065
  9. Ferreira, Sandra. "Random sample sizes in one-way fixed effects models". Paper presented in 17th International Conference on Computational and Mathematical Methods in Science and Engineering, 2017.
    Published
  10. Capistrano, G.; Nunes, C.; Ferreira, D.; Ferreira, S.S.; Mexia, J.T.. "One-way random effects ANOVA with random sample sizes: An application to a Brazilian database on cancer registries". 2015.
    10.1063/1.4912416
  11. Nunes, C.; Capistrano, G.; Ferreira, D.; Ferreira, S.S.; Mexia, J.T.. "One-way fixed effects ANOVA with missing observations". 2015.
    10.1063/1.4912415
  12. Ferreira, D.; Ferreira, S.S.; Nunes, C.; Mexia, J.T.; Ferreira, Dário; Ferreira, Sandra S.; Nunes, Célia; Mexia, João T.. "Estimation of variance components in normal linear mixed models with additivity". Paper presented in 12th International Conference of Numerical Analysis and Applied Mathematics, 2014.
    Published • 10.1063/1.4912414
  13. Capistrano, Gilberto; Nunes, Célia; Ferreira, Dário; Ferreira, Sandra S.; Mexia, João T.. "One-way random effects ANOVA with random sample sizes: An application to a Brazilian database on cancer registries". Paper presented in INTERNATIONAL CONFERENCE ON NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2014, 2014.
    Published • 10.1063/1.4912416
  14. Nunes, Célia; Capistrano, Gilberto; Ferreira, Dário; Ferreira, Sandra S.; Mexia, João T.. "One-way fixed effects ANOVA with missing observations". Paper presented in INTERNATIONAL CONFERENCE ON NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2014, 2014.
    Published • 10.1063/1.4912415
  15. "Inference for estimable vectors in Orthogonally separated normal mixed models". 2008.
  16. Ferreira, Sandra. "Distribuições F generalizadas com parâmetros de não centralidade fixos e aleatórios". 2007.
  17. Ferreira, Sandra. "Par de modelos com encaixe". 2005.
Conference poster
  1. Ferreira, Sandra. "Estimação do cumulante de quarta ordem em modelos lineares mistos". 2019.
  2. Ferreira, Sandra. "Failures of ANOVA observations with a fixed effects factor". 2015.
    10.13140/RG.2.2.15515.46883
  3. Ferreira, Sandra. "ANOVA with random sample sizes: One-way random effects with an application on cancer registries from USA". 2014.
    10.13140/RG.2.2.12998.88641
  4. Ferreira, Sandra. "One-way random effects ANOVA with random sample sizes: An application on cancer registries". 2013.
Journal article
  1. Vinoth Raman; Sandra S. Ferreira; Dário Ferreira; Ayman Alzaatreh. "A Multi-State Model for Lung Cancer Mortality in Survival Progression". Stats (2025): https://doi.org/10.3390/stats8040106.
    10.3390/stats8040106
  2. Francisco Pires; Maria Inês Vigário; Sandra S. Ferreira; António Vicente. "Associations Between Psychological Coping Skills and Player Behaviors During Transition Moments in Male Youth Football". Sports (2025): https://doi.org/10.3390/sports13100363.
    10.3390/sports13100363
  3. Sandra S. Ferreira; Dário Ferreira. "The Three-Parameter Exponentiated Weibull Exponential Distribution: Theoretical Properties and Practical Implications". Communications on Applied Mathematics and Computation (2025): https://doi.org/10.1007/s42967-025-00503-4.
    10.1007/s42967-025-00503-4
  4. Sandra Duarte-da-Fonseca Dias; Luís Pinto-de-Andrade; Joana Rolo; Carlos Gaspar; Patrícia Gomes-Ruivo; Ana Sofia Oliveira; Sandra Saraiva Ferreira; et al. "Reproductive Toxicity Assessment of Four Portuguese Plant Hydrolates: Effects on Oocyte Maturation and Sperm Viability". Animals (2025): https://doi.org/10.3390/ani15192838.
    10.3390/ani15192838
  5. Dário Ferreira; Sandra Ferreira. "CMMSE: A Time-Varying Approach to Linear Mixed Models". Mathematical Methods in the Applied Sciences (2025): https://doi.org/10.1002/mma.10819.
    10.1002/mma.10819
  6. Sandra S. Ferreira; Dário Ferreira. "Odd Generalized Exponential Kumaraswamy–Weibull Distribution". Mathematics (2025): https://doi.org/10.3390/math13071136.
    10.3390/math13071136
  7. Sandra S. Ferreira; Patrícia Antunes; Dário Ferreira. "Exploring Models with Generalized Gamma Density in Statistical Theory". WSEAS TRANSACTIONS ON MATHEMATICS (2024): http://dx.doi.org/10.37394/23206.2024.23.107.
    10.37394/23206.2024.23.107
  8. Mário J. Costa; Luis Quinta-Nova; Sandra Ferreira; Aldo M. Costa; Catarina C. Santos. "Trend Forecasting in Swimming World Records and in the Age of World Record Holders". Applied Sciences (2024): https://doi.org/10.3390/app14209492.
    10.3390/app14209492
  9. Dário Ferreira; Sandra S. Ferreira. "Measuring Sphericity in Positive Semi-Definite Matrices". Axioms (2024): https://doi.org/10.3390/axioms13080512.
    10.3390/axioms13080512
  10. Dário Ferreira; Sandra S. Ferreira. "Optimizing Allocation Rules in Discrete and Continuous Discriminant Analysis". Mathematics (2024): https://doi.org/10.3390/math12081173.
    10.3390/math12081173
  11. R. A. Bailey, Peter J. Cameron, Dário Ferreira, Sandra S. Ferreira, Célia Nunes. "Designs for Half-Diallel Experiments with Commutative Orthogonal Block Structure". Journal of Statistical Planning and Inference (2024): https://doi.org/10.1016/j.jspi.2023.106139.
    https://doi.org/10.1016/j.jspi.2023.106139
  12. Ferreira, Sandra. "Inference in mixed models with a mixture of distributions and controlled heteroscedasticity". Journal of Statistical Computation and Simulation (2024):
    Accepted
  13. Nunes, Célia; Dário Ferreira; Sandra S. Ferreira; Miguel Fonseca; Manuela Oliveira; João T. Mexia. "Noncentral Wishart matrices, asymptotic normality of vec and smooth statistics". Statistics (2023): 1-21. http://dx.doi.org/10.1080/02331888.2023.2174117.
    10.1080/02331888.2023.2174117
  14. Sandra S. Ferreira. "Preface to Computational Mathematics and Applied Statistics". Mathematical and Computational Applications (2023): https://www.mdpi.com/2297-8747/28/2/31.
    10.3390/mca28020031
  15. Dário Ferreira; Sandra S. Ferreira; Célia Nunes; João T. Mexia. "Orthogonal mixed models and prime basis factorials". Mathematical Methods in the Applied Sciences (2022): https://doi.org/10.1002/mma.7970.
    10.1002/mma.7970
  16. Dário Ferreira; Sandra S. Ferreira; Célia Nunes; João T. Mexia. "Inference in nonorthogonal mixed models". Mathematical Methods in the Applied Sciences (2022): https://doi.org/10.1002/mma.6866.
    10.1002/mma.6866
  17. Patrícia Antunes; Sandra S. Ferreira; Dário Ferreira; João T. Mexia; Patrícia Antunes, Sandra S. Ferreira, Dário Ferreira and João T. Mexia (2022). Bi-additive Models for Extremes.. "Bi-additive models for extremes". Communications in Statistics - Theory and Methods (2022): https://doi.org/10.1080/03610926.2022.2051053.
    10.1080/03610926.2022.2051053
  18. Ferreira, Dário; Ferreira, Sandra S.; Nunes, Célia; Fonseca, Miguel; Mexia, João T.. "Chisquared and related inducing pivot variables: an application to orthogonal mixed models". Communications in Statistics - Theory and Methods 48 22 (2019): 5445-5466. http://dx.doi.org/10.1080/03610926.2013.770532.
    Published • 10.1080/03610926.2013.770532
  19. Nunes, Célia; Capistrano, Gilberto; Ferreira, Dário; Ferreira, Sandra S.; Mexia, João Tiago. "Exact critical values for one-way fixed effects models with random sample sizes". Journal of Computational and Applied Mathematics 354 (2019): 112-122. http://dx.doi.org/10.1016/j.cam.2018.05.057.
    Published • 10.1016/j.cam.2018.05.057
  20. Ferreira, Sandra. "Considering the sample sizes as truncated Poisson random variables in mixed effects models". Journal of Applied Statistics (2019): http://dx.doi.org/10.1080/02664763.2019.1641188.
    10.1080/02664763.2019.1641188
  21. Ferreira, Sandra. "Random sample sizes in orthogonal mixed models with stability". Computational and Mathematical Methods (2019): http://dx.doi.org/10.1002/cmm4.1050.
    10.1002/cmm4.1050
  22. Nunes, Celia; Ferreira, Dario; Ferreira, Sandra S.; Mexia, Joao T.. "Limit distributions for asymptotically linear statistics with spherical error". Statistics, Optimization & Information Computing 6 3 (2018): http://dx.doi.org/10.19139/soic.v6i3.580.
    Published • 10.19139/soic.v6i3.580
  23. Ferreira, Dário; Ferreira, Sandra; Nunes, Célia; Fonseca, Miguel; Silva, Adilson; Mexia, João T.. "Estimation and incommutativity in mixed models". Journal of Multivariate Analysis 161 (2017): 58-67. http://dx.doi.org/10.1016/j.jmva.2017.07.002.
    Published • 10.1016/j.jmva.2017.07.002
  24. Costa, Aldo Matos; Costa, Mário Jorge; Reis, António Antunes; Ferreira, Sandra; Martins, Júlio; Pereira, Ana. "Secular Trends in Anthropometrics and Physical Fitness of Young Portuguese School-Aged Children". Acta Médica Portuguesa 30 2 (2017): 108. http://dx.doi.org/10.20344/amp.7712.
    Published • 10.20344/amp.7712
  25. Bailey, R.A.; Ferreira, Sandra S.; Ferreira, Dário; Nunes, Célia. "Estimability of variance components when all model matrices commute". Linear Algebra and its Applications 492 (2016): 144-160. http://dx.doi.org/10.1016/j.laa.2015.11.002.
    Published • 10.1016/j.laa.2015.11.002
  26. Ferreira, Dário; Ferreira, Sandra S.; Nunes, Célia; Mexia, João T.. "Estimation in mixed models through three step minimization". Communications in Statistics - Simulation and Computation 46 2 (2015): 1156-1166. http://dx.doi.org/10.1080/03610918.2014.992544.
    Published • 10.1080/03610918.2014.992544
  27. Ferreira, Sandra S.; Nunes, Celia; Ferreira, Dario; Moreira, Elsa; Mexia, Joao Tiago. "Estimation and Orthogonal Block Structure". Hacettepe Journal of Mathematics and Statistics 45 58 (2015): 1-1. http://dx.doi.org/10.15672/hjms.2015589756.
    Published • 10.15672/hjms.2015589756
  28. Nunes, C.; Ferreira, D.; Ferreira, S.S.; Mexia, J.T.. "Fixed effects ANOVA: An extension to samples with random size". Journal of Statistical Computation and Simulation 84 11 (2014): 2316-2328. http://www.scopus.com/inward/record.url?eid=2-s2.0-84904093295&partnerID=MN8TOARS.
    10.1080/00949655.2013.791293
  29. Rocha, H.A.; Marinho, D.A.; Ferreira, S.S.; Costa, A.M.. "Management and teaching methodology of swimming lessons in the Portuguese primary schools | Organização e metodologia de ensino da natação no 1° ciclo do ensino básico em Portugal". Motricidade 10 2 (2014): 45-59. http://www.scopus.com/inward/record.url?eid=2-s2.0-84902839145&partnerID=MN8TOARS.
    10.6063/motricidade.10(2).2709
  30. Nunes, C.; Capistrano, G.; Ferreira, D.; Ferreira, S.S.. "ANOVA with random sample sizes: An application to a Brazilian database on cancer registries". AIP Conference Proceedings 1558 (2013): 825-828. http://www.scopus.com/inward/record.url?eid=2-s2.0-84887530465&partnerID=MN8TOARS.
    10.1063/1.4825623
  31. Ferreira, D.; Ferreira, S.S.; Nunes, C.; Inácio, S.. "Inducing pivot variables and non-centrality parameters in elliptical distributions". AIP Conference Proceedings 1558 (2013): 833-836. http://www.scopus.com/inward/record.url?eid=2-s2.0-84887554653&partnerID=MN8TOARS.
    10.1063/1.4825625
  32. Costa, A.M.; Marques, M.C.; Louro, H.; Ferreira, S.S.; Marinho, D.A.. "The relative age effect among elite youth competitive swimmers". European Journal of Sport Science 13 5 (2013): 437-444. http://www.scopus.com/inward/record.url?eid=2-s2.0-84887995320&partnerID=MN8TOARS.
    10.1080/17461391.2012.742571
  33. Ferreira, S.S.; Ferreira, D.; Nunes, C.; Mexia, J.T.. "Estimation of variance components in linear mixed models with commutative orthogonal block structure | Estimación de las componentes de varianza en modelos lineales mixtos con estructura de bloques ortogonal conmutativa". Revista Colombiana de Estadistica 36 2 (2013): 261-271. http://www.scopus.com/inward/record.url?eid=2-s2.0-84890861258&partnerID=MN8TOARS.
  34. Nunes, C.; Ferreira, D.; Ferreira, S.S.; Oliveira, M.M.; Mexia, J.T.. "One-way random effects ANOVA: An extension to samples with random size". AIP Conference Proceedings 1479 1 (2012): 1678-1681. http://www.scopus.com/inward/record.url?eid=2-s2.0-84883065159&partnerID=MN8TOARS.
    10.1063/1.4756492
  35. Ferreira, S.S.; Ferreira, D.; Nunes, C.. "Linear and quadratic sufficiency and commutativity". AIP Conference Proceedings 1479 1 (2012): 1694-1697. http://www.scopus.com/inward/record.url?eid=2-s2.0-84883118782&partnerID=MN8TOARS.
    10.1063/1.4756496
  36. Ferreira, D.; Ferreira, S.S.; Nunes, C.; Ramos, L.; Mexia, J.T.. "Approximate normality of low degree polynomials in normal independent variables". Far East Journal of Mathematical Sciences 68 2 (2012): 287-296. http://www.scopus.com/inward/record.url?eid=2-s2.0-84864460081&partnerID=MN8TOARS.
  37. Costa, A.M.; Marinho, D.A.; Rocha, H.; Silva, A.J.; Barbosa, T.M.; Ferreira, S.S.; Martins, M.. "Deep and shallow water effects on developing preschoolers' aquatic skills". Journal of Human Kinetics 32 1 (2012): 211-219. http://www.scopus.com/inward/record.url?eid=2-s2.0-84862004736&partnerID=MN8TOARS.
    10.2478/v10078-012-0037-1
  38. Nunes, C.; Ferreira, D.; Ferreira, S.S.; Mexia, J.T.. "F-tests with a rare pathology". Journal of Applied Statistics 39 3 (2012): 551-561. http://www.scopus.com/inward/record.url?eid=2-s2.0-84856832767&partnerID=MN8TOARS.
    10.1080/02664763.2011.603293
  39. Nunes, C.; Ferreira, D.; Ferreira, S.S.; Mexia, J.T.. "Generalized F distributions with random non-centrality parameters: Convolution of Gamma and Beta variables". Far East Journal of Mathematical Sciences 62 1 (2012): 1-14. http://www.scopus.com/inward/record.url?eid=2-s2.0-84859075783&partnerID=MN8TOARS.
  40. Nunes, C.; Ferreira, D.; Ferreira, S.S.; Mexia, J.T.. "Control of the truncation errors for generalized F distributions". Journal of Statistical Computation and Simulation 82 2 (2012): 165-171. http://www.scopus.com/inward/record.url?eid=2-s2.0-84857008127&partnerID=MN8TOARS.
    10.1080/00949655.2011.631924
  41. Ferreira, D.; Ferreira, S.S.; Nunes, C.. "Confidence regions for variance components using inducing pivot variables". AIP Conference Proceedings 1479 1 (2012): 1682-1685. http://www.scopus.com/inward/record.url?eid=2-s2.0-84883085730&partnerID=MN8TOARS.
    10.1063/1.4756493
  42. Mexia, J.T.; Nunes, C.; Ferreira, D.; Ferreira, S.S.; Moreira, E.. "Orthogonal fixed effects ANOVA with random sample sizes". International Conference on Applied Mathematics, Simulation, Modelling - Proceedings (2011): 84-90. http://www.scopus.com/inward/record.url?eid=2-s2.0-82055194465&partnerID=MN8TOARS.
  43. Ferreira, S.S.; Ferreira, D.; Nunes, C.; Mexia, J.T.. "Discriminant analysis and decision theory". Far East Journal of Mathematical Sciences 51 1 (2011): 69-79. http://www.scopus.com/inward/record.url?eid=2-s2.0-79956287849&partnerID=MN8TOARS.
  44. Nunes, C.; Ferreira, D.; Ferreira, S.S.; Mexia, J.T.. "F tests with random sample sizes". AIP Conference Proceedings 1281 (2010): 1241-1244. http://www.scopus.com/inward/record.url?eid=2-s2.0-79954481338&partnerID=MN8TOARS.
    10.1063/1.3497911
  45. Ferreira, D.; Ferreira, S.S.; Nunes, C.; Mexia, J.T.. "Maximum likelihood estimation methods for variance components in linear non-orthogonal small size design models". AIP Conference Proceedings 1281 (2010): 1233-1236. http://www.scopus.com/inward/record.url?eid=2-s2.0-79954493672&partnerID=MN8TOARS.
    10.1063/1.3497905
  46. Ferreira, S.S.; Ferreira, D.; Nunes, C.; Mexia, J.T.. "Crossing segregated models with commutative orthogonal block structure". AIP Conference Proceedings 1281 (2010): 1229-1232. http://www.scopus.com/inward/record.url?eid=2-s2.0-79954521395&partnerID=MN8TOARS.
    10.1063/1.3497904
  47. Ferreira, Sandra. "Nesting Segregated Mixed Models". Journal of Statistical Theory and Practice (2010): http://dx.doi.org/10.1080/15598608.2010.10411983.
    10.1080/15598608.2010.10411983
  48. Ferreira, S.S.; Ferreira, D.; Moreira, E.; Mexia, J.T.. "Inference for L orthogonal models". Journal of Interdisciplinary Mathematics 12 6 (2009): 815-824. http://www.scopus.com/inward/record.url?eid=2-s2.0-84890089375&partnerID=MN8TOARS.
    10.1080/09720502.2009.10700666
  49. Ferreira, S.S.; Ferreira, D.; Mexia, J.T.. "Double tier cross nesting design models". Journal of Interdisciplinary Mathematics 11 2 (2008): 275-289. http://www.scopus.com/inward/record.url?eid=2-s2.0-84890095320&partnerID=MN8TOARS.
    10.1080/09720502.2008.10700558
  50. Ferreira, Sandra. "Cross Additivity in Balanced Cross Nesting Models". Journal of Statistical Theory and Practice (2007): http://dx.doi.org/10.1080/15598608.2007.10411847.
    10.1080/15598608.2007.10411847
  51. Ferreira, Sandra. "Joint estimation for normal orthogonal mixed models". Discussiones Mathematicae Probability and Statistics (2007): http://dx.doi.org/10.7151/dmps.1085.
    10.7151/dmps.1085
  52. Ferreira, Sandra. "Cross additivity - an application". Discussiones Mathematicae Probability and Statistics (2006): http://dx.doi.org/10.7151/dmps.1083.
    10.7151/dmps.1083
  53. Ferreira, Sandra. "Stable Hypothesis For Mixed Models With Balanced Cross- Nesting". Stable Hypothesis For Mixed Models With Balanced Cross- Nesting. Discussiones Mathematicae - Probability and Statistics, 25, (2005): https://www.semanticscholar.org/paper/Stable-hypothesis-for-mixed-models-with-balanced-Ferreira-Mexia/5c8c6a2911be92edf6ef96ca4dd358a85b034244.
    10.7151/dmps.1071
Magazine article
  1. Niarakis, Anna. et al. "Building an international and interdisciplinary community to develop immune digital twins for complex human pathologies", 2024, https://zenodo.org/doi/10.5281/zenodo.10783684.
    10.5281/ZENODO.10783684
Newspaper article
  1. Niarakis, Anna. et al. Corresponding author: Niarakis, Anna. et al. "Immune digital twins for complex human pathologies: applications, limitations, and challenges", npj Systems Biology and Applications, 2024
  2. Ferreira, S. S., Ferreira, D., Nunes, C. and Mexia, J. T. (2022). Confidence Intervals and ellipsoids for estimable func; Sandra S. Ferreira; Dário Ferreira; Célia Nunes; João T. Mexia. "Confidence Intervals and ellipsoids for estimable functions and estimable vectors in models with orthogonal block structure", Mathematical Methods in the Applied Sciences, 2022, 46, https://doi.org/10.1002/mma.8515.
    10.1002/mma.8515
  3. Ferreira, Sandra. "An algorithm for simulation in mixed models with crossed factors considering the sample sizes as random", Journal of Computational and Applied Mathematics , 2021, https://doi.org/10.1016/j.cam.2021.113463.
  4. Ferreira, Sandra. "Perceived and real aquatic competence in children from 6 years to 10 years old", International Journal of Environmental Research and Public Health, 2020, https://doi.org/10.3390/ijerph17176101.
  5. Ferreira, Sandra; Patrícia Antunes; Sandra S. Ferreira; Dário Ferreira; João T. Mexia; Ferreira, Sandra. "Multiple Additive Models", Communications in Statistics ¿ Theory and Methods, 2020, https://doi.org/10.1080/03610926.2020.1723636.
    10.1080/03610926.2020.1723636
  6. Ferreira, Sandra; Patrícia Antunes; Sandra S. Ferreira; Dário Ferreira; Célia Nunes; João Tiago Mexia. "Estimation in additive models and ANOVA-like applications", Journal of Applied Statistics, 2020, https://doi.org/10.1080/02664763.2020.1723501.
    10.1080/02664763.2020.1723501
  7. Ferreira, Sandra; Ana Sofia Oliveira; Cátia Vicente Vaz; Ana Silva; Sandra Saraiva Ferreira; Sara Correia; Raquel Ferreira; et al. "Chemical signature and antimicrobial activity of Central Portuguese Natural Mineral Waters against selected skin pathogens", Environmental Geochemistry and Health, 2020, https://doi.org/10.1007/s10653-019-00473-6.
    10.1007/s10653-019-00473-6
  8. Ferreira, Sandra. "Tests and relevancies for the hypotheses of an orthogonal family in a model with orthogonal block structure", Journal of Statistical Computation and Simulation, 2020, https://doi.org/10.1080/00949655.2019.1686635.
  9. Ferreira, Sandra. "Concentration of salivary cortisol and testosterone in elite women soccer players: Analysis of performance in official matches", Kinesiology, 2020, https://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=332680.
Distinctions

Other distinction

2018 ELSEVIER MATHEMATICAL SCIENCES SPONSORSHIP FUND
Elsevier Inc, United States
2011 Orthogonal Fixed Effects ANOVA with Random Sample Sizes
International Conference on Applied Mathematics, Simulation, Modelling (ASM'11), Corfu Island, Greece, 14-16, July., Greece
2008 Bolsa Processo nº 21-93096-S
Fundação Calouste Gulbenkian, Portugal