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Lutz, Wolfgang; Leon, Scott; Martinovich, Zoran; Lyons, John; Stiles, William (2007). Therapist effects in outpatient psychotherapy: A three-level growth curve approach. Journal of counseling psychology, 54(1), pp. 32-39. Dubuque, Iowa: American Psychological Association 10.1037/0022-0167.54.1.32
Lutz, Wolfgang; Saunders, Stephen; Leon, Scott; Martiniwich, Zoran; Kosfelder, Joachim; Schulte, Dietmar; Grawe, Klaus; Tholen, Sven (2006). Empirical and clinical useful decision making in psychotherapy: Differential Predictions with Treatment Response Models. Psychological assessment, 18(2), pp. 133-141. Washington, D.C.: American Psychological Association 10.1037/1040-3590.18.2.133