NORDHAUSEN, K.; OJA, H. Multivariate L1 Statistical Methods: The Package MNM. Journal of Statistical Software, [S. l.], v. 43, n. 5, p. 1–28, 2011. DOI: 10.18637/jss.v043.i05. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v043i05. Acesso em: 5 dec. 2022.