1. Bierer, D. E., D. M. Fort, L. G. Dubenko, C. Mendez, J. Luo, M. Reed, P. Peterli-Roth, R. E. Gerber, J. Litvak, N. Waldeck, T. J. Carlson, S. R. King, R. C. Bruening, R. F. Hector, and G. R. Reaven. 1998. Ethnobotanical-directed discovery of Cryptolepine fromCryptolepis sanguinolenta: its isolation, synthesis and antihyperglycemic activity. Journal of Medicinal Chemistry 41:894–901.
2. Blum, E. 1993. Making biodiversity conservation profitable: A case study of the Merck/Inbio agreement. Environment 35(4): 16–20, 38-45.
3. Boom, B. 1990. Ethics in ethnopharmacology.In Vol. 2 of Proceeding of the First Congress of Ethnobiology, edited by E. Elisabetsky, Museu Paraense Emilo Goeldi, Belem, Brazil.
4. Carlson, T. J. S. 1998. Ethnomedical field research, medicinal plants, and tropical public health. Rainforest Medical Bulletin, Netherlands 5(l):7–8.
5. Carlson, T. J.and S. R. King. 1997. Ethnomedical field research methods to assess medicinal plants.In Iwu, M. M., E. N. Sokomba, C. O. Okunji, C. Obijiofor, and I. P. Akubue, eds., Commercial production of indigenous plants as phytomedicines and cosmetics. BDCP Press, p. 152-165.