ZEILEIS, A.; KOENKER, R. Econometrics in R: Past, Present, and Future. Journal of Statistical Software, [S. l.], v. 27, n. 1, p. 1–5, 2008. DOI: 10.18637/jss.v027.i01. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v027i01. Acesso em: 29 apr. 2024.