HOLTKAMP, J.; BRÜMMER, B. Stochastic Frontier Analysis Using SFAMB for Ox. Journal of Statistical Software, [S. l.], v. 81, n. 6, p. 1–29, 2017. DOI: 10.18637/jss.v081.i06. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v081i06. Acesso em: 25 apr. 2024.