MARQUES, Rui Cunha. Measuring the total factor productivity of the portuguese water and sewerage services. Economia Aplicada, São Paulo, Brasil, v. 12, n. 2, p. 215–237, 2008. DOI: 10.1590/S1413-80502008000200003. Disponível em: https://journals.usp.br/ecoa/article/view/978.. Acesso em: 22 jul. 2024.