Escalona Anzola L, García Cebrián L, Espitia Escuer M. Economic efficiency of venezuelan water companies. Teor. Enfoques. Apl. Cienc. Soc. 2012;4(9):97-107. Accessed October 5, 2026. https://mail.revistas.uclave.org/index.php/teacs/article/view/1685