@TECHREPORT{Dia_Vel_2017,
author = "Diaz Espinosa, Estefania - Morales, Brenda",
title = "Velpar sas",
year = 2017,
institution = "Repositorio Corporación Unificada Nacional de Educación Superior",
url = "https://repositorio.cun.edu.co/handle/cun/2177",
}