An Internet-Based Intervention for Depressive Symptoms: Preliminary Data on the Contribution of Behavioral Activation and Positive Psychotherapy Strategies. - Sonia Romero; Adriana Mira; Juana Bretón-López; Amanda Díaz-García; Laura Díaz-Sanahuja; Azucena García-Palacios; Cristina Botella (MindCare, 2019)