1. The Potential of African Plants as a Source of Drugs
2. K. Vasisht and V.Kumar, Compendium of Medidincal and aromatic plants, Africa. ICS-UNIDO, Trieste, 2004, vol. 1, pp. 23–56
3. Bioactive natural products derived from the Central African flora against neglected tropical diseases and HIV
4. S. M. N. Efange , Natural products: a continuing source of inspiration for the medicinal chemist, in Advances in Phytomedicine, Ethnomedicine and Drug Discovery, ed. M. M. Iwu and J. C. Wootton, Elsevier Science, Amsterdam, The Netherlands, 2002, vol. 1, pp. 61–69
5. World Health Organization , Traditional traditional medicine, Fact sheet no. 134, Geneva, WHO, 2003