“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, no. 25 (January 15, 2021): 107–119. Accessed February 26, 2026. https://revistas.unac.edu.co/index.php/unaciencia/article/view/564.