1. Akhila, A. and Rani, K., Chemistry of the neem tree (Azadirachta indica A. Juss). In: H. W. (Ed.), Progress in the Chemistry of Organic Natural Products. Springer-Verlag Wien, New York, pp. 47–149, (1999).
2. Akhila, A. and Rani, K., Biosynthesis of some biologically active limonoids in the leaves of Azadirachta indica (the Indian neem tree). Indian J. Heterocycl. Chem., 11, 299–302 (2002).
3. Bokel, M., Cramer, R., Gutzeit, H., Reeb, S., and Kraus, W., Tetranortriterpenoids related to nimbin and nimbolide from Azadirachta indica A. Juss (Meliaceae). Tetrahedron, 46, 775–782 (1990).
4. Chinese Pharmacopoeia Committee (Ed.), Chinese Pharmacopoeia. Chemical Industry Press, Beijing, (2005).
5. Cohen, E., Quistad, G. B., and Casida, J. E., Cytotoxicity of nimbolide, epoxyazadiradione and other limonoids from neem insecticide. Life Sci., 58, 1075–1081 (1996a).