YLVISAKER, D. Jan de Leeuw and Statistics at UCLA. Journal of Statistical Software, [S. l.], v. 73, n. 9, p. 1–6, 2016. DOI: 10.18637/jss.v073.i09. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v073i09. Acesso em: 3 dec. 2022.