HOTHORN, Torsten; HORNIK, Kurt; VAN DE WIEL, Mark A.; ZEILEIS, Achim. Implementing a Class of Permutation Tests: The coin Package. Journal of Statistical Software, [S. l.], v. 28, n. 8, p. 1–23, 2008. DOI: 10.18637/jss.v028.i08. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v028i08. Acesso em: 30 mar. 2025.