Ramos-Brieva, J. A., et al. “The Axial Diagnostic Criteria for Depression. Development, Construct and Predictive Validity and Reliability”. Actas Españolas De Psiquiatría, vol. 37, no. 6, Nov. 2009, pp. 306-19, https://actaspsiquiatria.es/index.php/actas/article/view/1154.