Gutiérrez Frailea, M., et al. “Risperidone in the Early Treatment of First-Episode Psychosis: A Two-Year Follow-up Study”. Actas Españolas De Psiquiatría, vol. 30, no. 3, May 2002, pp. 142-5, https://actaspsiquiatria.es/index.php/actas/article/view/1002.