Ros, Claudia, Josepa Canals, Edelmira Domènech-llabeira, Mª Eugenia Gras, and Ferrán Viñas. “Psychological and family factors associated with suicidal ideation in pre-adolcscents”. The Spanish Journal of Psychology, vol. 5, vol. 5, no. 1, 2002, p. 20, https://revistas.ucm.es/index.php/SJOP/article/view/SJOP0202120020A.