FILIPPINI, M.; OREA, L. Applications of the stochastic frontier approach in Energy Economics. Economics and Business Letters, [S. l.], v. 3, n. 1, p. 35-42, 2014. DOI: 10.17811/ebl.3.1.2014.35-42. Disponível em: https://reunido.uniovi.es/index.php/EBL/article/view/10233. Acesso em: 25 jun. 2022.