UDINA, Frederic. Interactive Biplot Construction. Journal of Statistical Software, [S. l.], v. 13, n. 5, p. 1–16, 2005. DOI: 10.18637/jss.v013.i05. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v013i05. Acesso em: 6 apr. 2025.