The Helsinki psychotherapy study: Effectiveness, sufficiency, and suitability of short- and long-term psychotherapy

Knekt, P., Laaksonen, M. A., Härkänen, T., Heinonen, T. M. E., Virtala, E., & Lindfors, O. (2012). The Helsinki psychotherapy study: Effectiveness, sufficiency, and suitability of short- and long-term psychotherapy. In Psychodynamic Psychotherapy Research: Evidence-Based Practice and Practice-Based Evidence (pp. 71–94). Humana Press Inc. https://doi.org/10.1007/978-1-60761-792-1_5