RAMOS REAL, F.J.; TOVAR, B. Revisiting electric utilities’ efficiency in the Southern African Power Pool, 1998–2009. Journal of Energy in Southern Africa, [S. l.], v. 31, n. 1, p. 1–13, 2020. DOI: 10.17159/2413-3051/2020/v31i1a7670. Disponível em: https://energyjournal.africa/article/view/7670. Acesso em: 26 may. 2024.