A. Cordero-Villafáfila, et al. “A Brief and Rapid Procedure to Measure the Intensity of Depressive Symptoms in Primary Care”. Actas Españolas De Psiquiatría, vol. 39, no. 1, Jan. 2011, pp. 45-48, https://actaspsiquiatria.es/index.php/actas/article/view/705.