1. Briggs, M.H., Briggs, M.: Biochemical contraception. London-New York-San Francisco: Academic Press 1976.
2. Cooke, D.: Clinics in Obstetrics and Gynaecology. The management of infertility. London-Philadelphia-Toronto: Saunders 1974.
3. Crosignani, P.G., James, V.H.T.: Recent progress in reproductive endocrinology. London-New York: Academic Press 1974.
4. Crosignani, P.G., Mishell, D.R.: Ovulation in the human. London-New York-San Francisco: Academic Press 1976.
5. Gold, J.J.: Gynecologic endocrinology. New York: Harper & Row 1975.