Caballero A. ., Muñoz D. ., Sánchez F. . y Carrera P. (2007). Emotional Ambivalence in Risk Behaviors: The Case of Occasional Excessive Use of Alcohol. The Spanish Journal of Psychology, 10(1), 151-158. https://revistas.ucm.es/index.php/SJOP/article/view/SJOP0707120151A