Chaves Cerón M, Luna Tascón EG, Ceballos Mora AK, Guerrero Fajardo V. 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. Univ. Salud [Internet]. 2013 Nov. 5 [cited 2026 Apr. 15];15(2):176-8. Available from: https://revistas2.udenar.edu.co/index.php/usalud/article/view/2361