A new approach to the efficiency concept in South African industry. Journal of Energy in Southern Africa, [S. l.], v. 18, n. 1, p. 51–63, 2007. DOI: 10.17159/2413-3051/2007/v18i1a3341. Disponível em: https://energyjournal.africa/article/view/3341. Acesso em: 13 nov. 2024.