DUONG, T. ks: Kernel Density Estimation and Kernel Discriminant Analysis for Multivariate Data in R. Journal of Statistical Software, [S. l.], v. 21, n. 7, p. 1–16, 2007. DOI: 10.18637/jss.v021.i07. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v021i07. Acesso em: 21 may. 2022.