1. GuillebaudJ.. Contraception and sterilisation. In: TurnbullA, ChamberlainG eds. Obstetrics. London: Churchill Livingstone; 1989:1135–52.
2. MasteraWH, JohnsonVL. Human Sexual Response. Boston: Little Brown; 1966.
3. RobsonKN, BrantWA, KumarR. Maternal sexuality during the first pregnancy after childbirth. Br J Obstet Gynaecol. 1981:88:882–9.
4. Olusanya O. An original system of social classification for use in Nigeria and other developing countries. Presented at the 24th Annual Conference on the West African College of Surgeons, Freetown, Sierra Leone, January 1984.
5. SapireEE. Contraception and sexuality in health and disease. Isando, South Africa: McGraw-Hill; 1986.