​

2023

               

• Ferreira SS, Ferreira D, Nunes C, Mexia JT. Confidence Intervals and ellipsoids for estimable functions and estimable vectors in models with orthogonal block structure. Math Meth Appl Sci. 46, 1, 356-367;https://doi.org/10.1002/mma.8515 

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• Nunes, C., Ferreira, D., Ferreira, S., Fonseca, M., Oliveira, M., Mexia, J.T. Noncentral Wishart matrices, asymptotic normality of vec and smooth statistics. Statistics.  https://doi.org/10.1080/02331888.2023.2174117

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2022

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• Dário Ferreira, Sandra S. Ferreira, Célia Nunes and João T. Mexia (2022). Inference in nonorthogonal mixed models. Mathematical Methods in the Applied Sciences 45, 5, 3183-3196  https://doi.org/10.1002/mma.6866

                 

• Patrícia Antunes, Sandra S. Ferreira, Dário Ferreira and João T. Mexia (2022). Bi-additive Models for Extremes. Communications in Statistics – Theory and Methods. https://doi.org/10.1080/03610926.2022.2051053)

                 

• Célia Nunes, Anacleto Mário, Dário Ferreira, Elsa Moreira, Sandra S. Ferreira and João T. Mexia (2022). An algorithm for simulation in mixed models with crossed factors considering the sample sizes as random. Journal of Computational and Applied Mathematics 404 (2022) 113463.    https://doi.org/10.1016/j.cam.2021.113463

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• Ferreira D, Ferreira SS, Nunes C, Mexia JT. Orthogonal mixed models and primebasis factorials. Math Meth Appl Sci. 2022; 45, 18, 12196-12205.    https://doi.org/10.1002/mma.7970  

 

2020

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• Patrícia Antunes, Sandra S. Ferreira, Dário Ferreira and João T. Mexia (2020). Multiple additive models. Communications in Statistics – Theory and Methods, VOL. 50, NO. 19, 4649-4655  https://doi.org/10.1080/03610926.2020.1723636

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• Patrícia Antunes, Sandra S. Ferreira, Dário Ferreira, Célia Nunes and João T. Mexia (2020). Estimation in Additive Models and ANOVA-like Applications. Journal of Applied Statistics. https://doi.org/10.1080/02664763.2020.1723501

            

• Dário Ferreira, Sandra S. Ferreira, Célia Nunes and João T. Mexia (2020). Tests and relevancies for the hypotheses of an orthogonal family in a model with orthogonal block structure. Journal of Statistical Computation and Simulation 90 3 412-419  https://doi.org/10.1080/00949655.2019.1686635

           

• Célia Nunes, Elsa Moreira, Dário Ferreira, Sandra S. Ferreira and João T. Mexia (2020). Considering the sample sizes as truncated Poisson random variables in mixed effects models.  Journal of Applied Statistics (CJAS)  47 13-15, 2641--2657.       IF 1.4     Q2   https://doi.org/10.1080/02664763.2019.1641188     

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• Ferreira D, Ferreira SS, Nunes C, Mexia JT. Orthogonal mixed models and prime basis factorials. Math Meth Appl Sci. 2021;1‐9. doi:10.1002/mma.7970

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• Mário J. Santos, Juliana Nunes, Dário Ferreira, António Pissarra da Costa (2018). Caracterização das Tentativas de Suicídio no Serviço de Urgência do Hospital Sousa Martins, Unidade Local de Saúde da Guarda. Psilogos 16, 2, 20—30. Caracterização das tentativas de suicídio no Serviço de Urgência do Hospital Sousa Martins, Unidade Local de Saúde da Guarda, EPE | Psilogos (rcaap.pt)

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2019

 

 

• Célia Nunes, Anacleto Mário, Dário Ferreira, Sandra S. Ferreira and João T. Mexia (2019). Random sample sizes in orthogonal mixed models with stability. Comp and Math Methods. https://doi.org/10.1002/cmm4.1050

 

• Nunes, C., Capistrano, G., Ferreira, D., Ferreira, S.S. and Mexia, J.T. (2019). Exact critical values for one-way fixed effects models with random sample sizes.  Journal of Computation and Applied Mathematics, 354, 112-122, https://www.sciencedirect.com/science/article/abs/pii/S0377042718303340?via%3Dihub

 

• Dário Ferreira, Sandra S. Ferreira, Célia Nunes, Miguel Fonseca & João T. Mexia (2019) Chisquared and related inducing pivot variables: an application to orthogonal mixed models, Communications in Statistics - Theory and Methods, 48:22, 5445-5466,

   https://www.tandfonline.com/doi/abs/10.1080/03610926.2013.770532

 

2018

 

• Nunes, C., Capristano, G., Ferreira, D., Ferreira, S.S. and Mexia, J. T (2018). Limit Distributions for Asymptotically Linear Statistics with Spherical Error.  Statistics, Optimization and Information Computing 6, 3, 409—414 https://www.authenticus.pt/en/publications/view/738269

 

• Nunes, C., Ferreira, D., Ferreira, S.S. and Mexia, J. T. (2018). Exact critical values for one-way fixed effects models with random sample sizes. Journal of Computational and Applied Mathematics 354, 112—122.

      https://www.sciencedirect.com/science/article/pii/S0377042718303340

 

2017

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• Ferreira, D., Ferreira, S., Nunes, C., Fonseca, M., Silva, A. and Mexia, J. T. (2017). Estimation and incommutativity in mixed models, Journal of Multivariate Analysis, 61, 58-67.

      http://dx.doi.org/10.1016/j.jmva.2017.07.002

 

• Ferreira, D., Ferreira, S. S., Nunes, C., Mexia, J. T. (2017). Estimation in mixed models through Three Step Minimization. Communications in Statistics - Simulation and Computation, 46, 1156-1166.

     DOI:10.1080/03610918.2014.992544

 

 

2016

 

• S. S. Ferreira, C. Nunes, D. Ferreira, E. Moreira, J. T. Mexia (2016). Estimation and Orthogonal Block Structure. Hacettepe Journal of Mathematics and Statistics  45 (2) (2016), 541 – 548.

 

2015

 

 

• R.A. Bailey, S. S. Ferreira, D. Ferreira, C. Nunes (2015).  Estimability of Variance Components when all Model Matrices Commute. Linear Algebra and its Applications,    Volume 492, 144–160. DOI:10.1016/j.laa.2015.11.002

 

 

 

2014

 

• Nunes, C., Ferreira, D., Ferreira, S. S., Mexia, J. T. (2014). Fixed effects ANOVA: An extension to samples with random size. Journal of Statistical Computation and Simulation 84(11):2316-2328.

 

 

2013

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• Nunes, C., Ferreira, D., Ferreira, S.S.  and Mexia, J. T. (2013)– Fixed effects ANOVA: An extension to samples with random size. J. Stat. Comput. Simul. Vol. 84(11), pp 2316-2328. DOI:10.1080/00949655.2013.791293 

 

• Sandra S. Ferreira, Dário Ferreira, Célia Nunes and João T. Mexia (2013). Estimation of Variance Components in Linear Mixed Models with Commutative Orthogonal Block Structure. Revista Colombiana de Estadística 36,  2 261-271.

 

 

2012

 

• Ferreira, D; Ferreira, Sandra S; Nunes C; Ramos, L. and Mexia, J. T. (2012).    Approximate Normality of Low Degree Polynomials in Normal Independent Variables. Far East Journal of Mathematical Sciences Volume 68, Issue 2, pages 287-296.  (Indexing: SCOPUS, MathSciNet, Zentralblatt)

 

• Nunes, C; Ferreira, D; Ferreira, Sandra S. and Mexia, J. T. (2012).  Generalized F Distributions with Random Non-Centrality Parameters: Convolution of Gamma and Beta Variables. Far East Journal of Mathematical Sciences Volume 62, Issue 1, pages 1-14.  (Indexing: SCOPUS, MathSciNet, Zentralblatt)

 

• Nunes, C; Ferreira, D; Ferreira, S. and Mexia, J. T. (2012).  F-tests with a rare pathology. Journal of Applied Statistics Volume 39, Issue 3, pages 551-561. DOI: 10.1080/02664763.2011.603293.  (Indexing: ISI Web of Knowledge)

 

• Nunes, C; Ferreira, D; Ferreira, S. and Mexia, J. T. (2012).  Control of the truncation errors for generalized F distributions. Journal of Statistical Computation and Simulation Volume 82, Issue 2, pages 165-171.  (Indexing: ISI Web of Knowledge)

 

• Ferreira, S; Ferreira, D; Nunes, C and Mexia, J. T. (2012). Estimation and Crosssing for Models with Commutative Orthogonal Block Structure. Advances and Applications in Statistical Sciences  Volume 7, Issue 2, pages 23-34. (Indexing: Mathematical Reviews, MathSciNet, Zentralblatt MATH)

 

2011

 

• Ferreira, S., Ferreira, D., Nunes, C. and Mexia, J. T. (2011). Discriminant Analysis and Decision Theory. Far East Journal of Mathematical Sciences (FJMS). V. 51, 1, 69-79. (Indexing: SCOPUS, MathSciNet, Zentralblatt)

 

2010

 

• Ferreira, S; Ferreira, D; Moreira, E. and Mexia, J.T. (2010). Exact Estimators for Normal Linear Models. Far East Journal of Theoretical Statistics Vol. 31 No 1, 33-48. ISSN: 0972-0863. (Indexing: MathSciNet, Zentralblatt)

 

• Ferreira, S., Ferreira, D., Nunes, C. and Mexia, J. T. (2010). Nesting segregated mixed models. Journal of  Statistical Theory and Practice. Vol. 4, Nº 2, 233-242. ISSN: 1559-8608(Print), 1559-8616(Online) DOI: 10.1080/15598608.2010.10411983. (Indexing: SCOPUS, MathSciNet, Zentralblatt)

 

2009

 

• Ferreira, D; Ferreira, S; Nunes, C. and Mexia, J.T. (2009) Adjustment of Normal Mixed Models Through Triple Minimization. INTERSTAT - Statistics on the Internet ISSN 1941-689X.

 

• Nunes, C; Ferreira, S; Ferreira, D. (2009). Generalized F Tests in Models with Random Perturbations: The Gamma Case. Discussiones Mathematicae Probability and Statistics 29 (2009 ). (Indexing: MathSciNet, Zentralblatt)

 

• Ferreira, S. S.; Ferreira, D; Moreira, E. and Mexia, J.T. (2009) Inference for L Orthogonal Models. Journal of Interdisciplinary Mathematics Vol 12, No 6, 815—824. ISSN 0972-0502. (Indexing: MathSciNet, Zentralblatt)

 

2008

 

• Ferreira, S; Ferreira, D and Mexia, J.T. (2008) Double Tier Cross Nesting Design Models -    Journal of Interdisciplinary Mathematics Vol. 11, No 2, 275—289. (Indexing: MathSciNet, Zentralblatt)

 

• Ferreira, D., Ferreira, S., Ramos, L. & Mexia, J.T. (2008). Normal Approximation to the Product of a Non Central Chi-Square by an Independent Normal Variable . Aplimat  - Journal of Applied Mathematics. Volume I, N. 2, 185—192.  ISSN: 1337-6365.

 

2007

 

• Ferreira, S. Ferreira, D. and  Mexia, J.T.  (2007). Cross Additivity in Models with Cross Nesting .  Journal of Statistical Theory and Practice. Volume I, Nos. 3 & 4, Dec. 2007, 377-392. ISSN: 1559-8608(Print), 1559-8616(Online) (Indexing: SCOPUS, MathSciNet, Zentralblatt)

 

2006

 

• Ferreira, S.; Ferreira, D. and  Mexia, J.T.  (2006). Cross Additivity-An Application.  Discussiones Mathematicae - Probability and Statistics, 26, 207--219. (Indexing: MathSciNet, Zentralblatt)

 

2005

 

•  Ferreira, D.; Mexia, J. T.; Saraiva, S. (2005). Stable hypothesis for mixed models with balanced cross-nesting. Discussiones Mathematicae – Probability and Statistics. Volume 25, 241-249. (Indexing: MathSciNet, Zentralblatt)

 

•  Ferreira, D.; Mexia, J. T. (2005) Confidence intervals for the variance components in a grapevine experiment. Listy Biometryczne – Biometrical Letters. Volume 42 Nº 2, 113-132.