Kast, Verena, and Mario Schlegel. “Re Special Issue on Quality Norms and Quality Management in Psychotherapy: Comment on Doris Lier’s Reply”. Psychotherapie-Wissenschaft 4, no. 2 (April 1, 1996): 107–109. Accessed November 10, 2026. https://psychotherapie-wissenschaft.info/article/view/654.