S. J. E. Bruijniks, U. Frank, B. Tuschen-Caffier, J. Werthmann, and F. Renner, “Skill Improvement Through Learning in Therapy (SKILT): A Study Protocol for a Randomized Trial Testing the Direct Effects of Cognitive Behavioral Therapy Skill Acquisition and Role of Learning Capacity in Depression”, Clin Psychol Eur, vol. 5, no. 1, p. Article e8475, Mar. 2023.