García Jiménez, D.C., Vásquez Prediga, M. and Lugo Martínez, B. (2021) “Effectiveness of the SECOP I and II electronic public procurement system in the sixth category municipalities of Antioquia”, Unaciencia, Revista de Estudios e Investigaciones, 13(25), pp. 107–119. doi:10.35997/unaciencia.v13i25.564.