GRÜN, B.; LEISCH, F. FlexMix Version 2: Finite Mixtures with Concomitant Variables and Varying and Constant Parameters. Journal of Statistical Software, [S. l.], v. 28, n. 4, p. 1–35, 2008. DOI: 10.18637/jss.v028.i04. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v028i04. Acesso em: 26 may. 2022.