Castillo Cadena, Fernando. “INTERNATIONAL ECONOMIC INTEGRATION, SUBSIDIES, SOCIAL PROTECTION AND SOCIAL SECURITY COVENANT BETWEEN COLOMBIA AND THE KINGDOM OF SPAIN”. Vniversitas 57, no. 117 (October 15, 2008): 323–356. Accessed July 17, 2024. https://revistas.javeriana.edu.co/index.php/vnijuri/article/view/14546.