1. Annon JS (1974) The behavioral treatment of sexual problems, Vol I. University Press, Honolulu
2. Annon JS (1975) The behavioral treatment of sexual disorders, Vol II; Intensive therapy. University Press, Honolulu
3. Bodemer DW (1976) Concepts of reproduction and its regulation in the history of western civilisation. Contraception 13: 427–446
4. Buddeberg C (1987) Sexualberatung, 2. Aufl. Enke, Stuttgart
5. Haeberle EJ (1983) The birth of sexology. A brief history in documents. Selbstverlag, Washington