Becoña, E., Martínez, úrsula, Calafat, A., Fernández-Hermida, J.R., Juan, M., Sumnall, H., Mendes, F. y Gabrhelík, R. 2013. Parental permissiveness, control, and affect and drug use among adolescents. Psicothema. 25, Número 3 (dic. 2013), 292–298.