1. Agazarian, Y. M. (1997). Systems-centered therapy for groups. New York: Guilford.
2. Arsenian, J., Semrad, E. V., & Shapiro, D. (1982). An analysis of integral of functions in small groups. International Journal of Group Psychotherapy, 12, 421–434.
3. Barker, D. B. (1991). The behavioral analysis of interpersonal intimacy in group development. Small Group Research, 22, 76–91.
4. Beck, A. P., & Lewis, C. M. (Hrsg.). (2000). The process of group psychotherapy: Systems for analyzing change. Washington, DC: American Psychological Association.
5. Bednar, R., & Kaul, T. (1978). Experiential group research: Current perspectives. In S. L. Garfield & A. E. Bergin (Hrsg.), Handbook of psychotherapy and behavior change (2. Aufl., S. 769–816). New York: Wiley.