Urueña Sánchez, Mario Iván. “Private Military Security Companies: The New Mercenaries?”. Revista Criminalidad 61, no. 1 (January 1, 2019): 97–110. Accessed May 18, 2024. https://revistacriminalidad.policia.gov.co:8000/index.php/revcriminalidad/article/view/51.