HAINMUELLER, J.; XU, Y. ebalance: A Stata Package for Entropy Balancing. Journal of Statistical Software, [S. l.], v. 54, n. 7, p. 1–18, 2013. DOI: 10.18637/jss.v054.i07. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v054i07. Acesso em: 8 feb. 2023.