D. C. García Jiménez, M. Vásquez Prediga, and B. Lugo Martínez, “Effectiveness of the SECOP I and II electronic public procurement system in the sixth category municipalities of Antioquia”, ReUNAC, vol. 13, no. 25, pp. 107–119, Jan. 2021, doi: 10.35997/unaciencia.v13i25.564.