1. Pharmacopoeia of the People’s Republic of China, English Edition, Vol. I, Chemical Industry Press, Beijing, China (2005)
2. Bensky, D., Gamble, A., Chinese Herbal Medicine: Materia Medica, Eastland Press Seattle, 309 (1993)
3. Atal, C.K., Ojha, J.N., Econ. Botany 19, 157 (1965)
4. Mehra, P.N., Puri, H.S., Ind. J. Pharm., 175 (1970)
5. Yen, K.-Y., The Illustrated Chinese Materia Medica: Crude and Prepared, SMC Publishing Inc., Taipei, Taiwan, R.O.C. (1992)