Ashbach, C. & Schermer, V.C. (1987) Object Relations. The Self and the Group: A Conceptual Paradigm. London: Karnac Books. Behr, H. & Hearst, L. (2005). Group-Analytic Psychotherapy. A Meeting Of Minds. London: Whurr Publishers Ltd. Bion, W.R. (1959). Experiences in Groups, New York: Basic Books, London: Tavistock. Cohen, M. (2010). 101 Interventions in Group Therapy.