@book{Peterfreund, author = {Peterfreund, E.}, title = {Information, Systems, and Psychoanalysis. An Evolutionary Biological Approach to Psychoanalytic Theory. New York (International Universities Press) 1971.}, language = {en} } @book{Peterfreund, author = {Peterfreund, E.}, title = {The Process of Psychoanalytic Therapy. Models and Strategies. Hillsdale, NJ (The Analytic Press) 1983.}, language = {en} }