Echebarría, R. Segarra, et al. “Controversies about Duration of Untreated Psychosis As Independent Prognostic Variable of the Evolutive Course of Schizophrenic Psychoses”. Actas Españolas De Psiquiatría, vol. 34, no. 6, Nov. 2006, pp. 377-85, https://actaspsiquiatria.es/index.php/actas/article/view/1387.