Schulthess, P., Tschuschke, V., Koemeda-Lutz, M., von Wyl, A., Crameri, A., & Roubal, J. (2016). Comparative naturalistic study on outpatient psychotherapeutic treatments including Gestalt therapy. W Towards research tradition in Gestalt therapy (ss. 335-355, ). Newcastle upon Tyne, United Kingdom: Cambridge Scholars Publishing.