Aristizábal Vallejo, Nidia. “Opinion of Educational Agents of Colombian and Spanish Psychology Programs on the Implications of the Aging of the Population”. Informes Psicológicos 10 (March 20, 2008): 81–100. Accessed June 6, 2026. https://revistas.upb.edu.co/index.php/informespsicologicos/article/view/932.