ZHELONKIN, M.; RONCHETTI, E. Robust Analysis of Sample Selection Models through the R Package ssmrob. Journal of Statistical Software, [S. l.], v. 99, n. 4, p. 1–35, 2021. DOI: 10.18637/jss.v099.i04. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v099i04. Acesso em: 17 oct. 2021.