Fried, Eiko I., Ricarda K. K. Proppert, and Carlotta L. Rieble. “Building an Early Warning System for Depression: Rationale, Objectives, and Methods of the WARN-D Study”. Clinical Psychology in Europe 5, no. 3 (September 29, 2023): Article e10075. Accessed May 6, 2026. https://cpe.psychopen.eu/index.php/cpe/article/view/10075.