1. Cohn, R.C. (1969) "From couch to circle to community: beginnings of the theme-centered interactional method," pp. 852-878 in H. M. Ruitenbeek (ed.) Group Therapy Today: Styles, Methods and Techniques. Chicago: Aldine .
2. Friedman, M. (1963) "Dialogue and the essential we: the basis of value in the philosophy of Martin Buber," pp. 604-612 in M. Rosenbaum and M. Berger (eds.) Group Psychotherapy and Group Function. New York : Basic Books.