JACKSON, C. flexsurv: A Platform for Parametric Survival Modeling in R. Journal of Statistical Software, [S. l.], v. 70, n. 8, p. 1–33, 2016. DOI: 10.18637/jss.v070.i08. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v070i08. Acesso em: 4 dec. 2021.