1. American Psychoanalytic Association: Report of the Central Fact Gathering Committee. New York, 1956, unpublished
2. Beagler E: Homosexuality: Disease or Way of Life? New York, Hill and Wang, 1956
3. Bieber I at al.: Homosexuality: A Psychoanalytic Study of Male Homosexuals. New York, Basic Books, 1962
4. Bieber T B: Group therapy with homosexuals, in Kaplan H I, Sadock B S (eds): Comprehensive Group Therapy. Baltimore, Williams and Wilkins, 1971
5. Bychowski G: The ego of homosexuals. Int J Psychoanal 26: 114–127, 1945