1. Behr, L. (1995). The Integration of Theory and Practice. In M. Sharpe (Ed.), The Third Eye. Supervision of Analytic Groups (pp. 4–17). London: Routledge.
2. Croce, B. (1909). Aesthetic as Science of Expression and General Linguistic. BiblioBazaar (2006).
3. De Mare, P.B. (1972). Perspectives in Group Psychotherapy. A Theoretical Background. London: Allen and Unwin.
4. Fikiori, I. (2007). Evaluation of the Training Factors in a Training Community. Research Study. Dissertation. Institute of Psychodrama and Sociotherapy, Open Psychotherapy Centre, Athens.
5. Foulkes, S. H. (1948). Introduction to Group Analytic Psychotherapy. Studies in the Social Integration of Individuals and Groups. London: Heinemann (Reprinted, London, Karnac Books, 1983).