CAVALIERE, G. Determination of the number of factors in the presence of correlated error terms. Statistica, [S. l.], v. 55, n. 4, p. 495–516, 1995. DOI: 10.6092/issn.1973-2201/991. Disponível em: https://rivista-statistica.unibo.it/article/view/991. Acesso em: 26 oct. 2021.