Chaves Cerón, M. (2013) “Ecological model and systems of moral, cultural and legal regulation as risk and protection factors againts substances abuse among students of the University of Nariño”, Universidad y Salud. San Juan de Pasto, CO, 15(2), pp. 176–186. Available at: https://revistas2.udenar.edu.co/index.php/usalud/article/view/2361 (Accessed: 15 April 2026).