LIPKOVICH, I. A.; SMITH, E. P. Biplot and Singular Value Decomposition Macros for Excel©. Journal of Statistical Software, [S. l.], v. 7, n. 5, p. 1–15, 2002. DOI: 10.18637/jss.v007.i05. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v007i05. Acesso em: 4 dec. 2022.