CAMILLO, F.; D’ATTOMA, I. %GI: A SAS Macro for Measuring and Testing Global Imbalance of Covariates within Subgroups. Journal of Statistical Software, Code Snippets, [S. l.], v. 51, n. 1, p. 1–19, 2012. DOI: 10.18637/jss.v051.c01. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v051c01. Acesso em: 29 jan. 2022.