LUMLEY, T. Analysis of Complex Survey Samples. Journal of Statistical Software, [S. l.], v. 9, n. 8, p. 1–19, 2004. DOI: 10.18637/jss.v009.i08. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v009i08. Acesso em: 27 may. 2022.