Baltagi, B. H. (2021) Econometric analysis of panel data. Springer Nature.
Multivariate data analysis (7th ed.). Upper Saddle River, NJ: Prentice Hall. (2009) Hair, J. F., Black, W. C., Babin, B. J., & Anderson, R. E.
Hair, J. F., Hult, G. T. M., Ringle, C. M., & Sarstedt, M. (2014) A primer on partial least squares structural equations modeling (PLS-SEM). Los Angeles: SAGE.
Marôco, J. (2021) Análise Estatística com o SPSS Statistics (8.ª Edição), Lisboa: ReportNumber
Ragin, C. C. (2008) Redesigning social inquiry: Fuzzy sets and beyond. Chicago: University of Chicago Press
Saunders, M., Lewis, P., and Thornhill, P. (2009) Research methods for business students, 5th Edition, Harlow: Pearson