@TECHREPORT{Col_OPS_2012,
author = "Collante de las Salas, Eduardo Salomón - Hernández, Jaqueline",
title = "OPS Orden de prestación de servicios /",
year = 2012,
institution = "CECAR",
url = "http://repositorio.cecar.edu.co/handle/cecar/7917",
}