HORNIK, K.; FEINERER, I.; KOBER, M.; BUCHTA, C. Spherical k-Means Clustering. Journal of Statistical Software, [S. l.], v. 50, n. 10, p. 1–22, 2012. DOI: 10.18637/jss.v050.i10. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v050i10. Acesso em: 3 feb. 2023.