Martinez, A. D., Baizabal, M. M. J., Maqueo, E. L. G., & Abad, M. C. (2003). Detection of treatment refusal on undergraduates [Spanish]. Psiquiatria, 19(1), 1–9. http://www.conexionejecutiva.com/LOGIN.CFM/page=get\_office.cfm/id\_office/2501/LANG/0