[1] Kigelia Africana, 2010. http://enwikipedia.org/wiki/kigelia
[2] O. M. Grace, M. E. Light, K. L. Lindsey, D. A. Moholland, J. V. Staden and A. K. Jager, “Antibacterial Activity and Isolation of Active Compounds from Fruit of the Traditional African Medicinal Tree Kigelia africana,” South African Journal of Botany, Vol. 66, No. 2, 2002, pp. 220-222.
[3] A. G. Olatunji and O. Atolani, “Comprehensive Scientific Demystification of Kigelia africana: A Review,” African Journal of Pure and Applied Chemistry, Vol. 3, No. 9, 2009, pp. 158-164.
[4] I. L. Wong, “Polycystic Ovary Syndrome (PCOS), Insulin Resistance (IR) and Metformin: Latest Development,” 2005.
[5] http://www.infertilityspecialist.com/articles/polycysticovarysyndrome.pdf M. M. du Tolt and T. I. Siebert, “Polycystic Ovary Syndrome (PCOS)—The Long Term Implications,” South African Journal of Obstetrics and Gynaecology, Vol. 15, No. 2, 2009, pp. 48-52.