WARREN BRETTENNY; GARY SHARP. Efficiency evaluation of urban and rural municipal water service authorities in South Africa: A data envelopment analysis approach. Water SA, [S. l.], v. 42, n. 1 January, 2016. DOI: 10.4314/wsa.v42i1.02. Disponível em: https://watersa.net/article/view/10794. Acesso em: 17 may. 2024.