PATEIRO-LÓPEZ, Beatriz; RODRÍGUEZ-CASAL, Alberto. Generalizing the Convex Hull of a Sample: The R Package alphahull. Journal of Statistical Software, [S. l.], v. 34, n. 5, p. 1–28, 2010. DOI: 10.18637/jss.v034.i05. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v034i05. Acesso em: 2 apr. 2025.