Suelves, Josep M., and Miquel Sánchez-Turet. “ASSERTIVENESS AND SUBSTANCE USE IN ADOLESCENCE: RESULTS FROM A CROSS-SECTIONAL STUDY”. Anales De Psicología Annals of Psychology, vol. 17, no. 1, Jan. 2001, pp. 14-21, https://revistas.um.es/analesps/article/view/29051.