1. Pharmacopoeia of the People’s Republic of China (English Edition), People’s Medical Publishing House, Beijing, China (1992/2005 Vol I)
2. The Pharmacopoeia of Japan Eleventh Edition (English Edition); p 1403; The Society of Japanese Pharmacopoeia
3. Paulus, E., Ding, Y.-H., Handbuch der traditionellen chinesischen Heilpflanzen, Haug Verlag (1987)
4. Chang, H.-M., But, R-H., Pharmacology and Applications of Chinese Materia Medica, World Scientific, Singapore (1986)
5. Tang, W., Eisenbrand, G., Chinese drugs of plant origin, Springer-Verlag, Berlin, Heidelberg, New York (1992)