1. H.Y. Hsu, Y.P. Chen, S.J. Sheu, C.H. Hsu, C.C. Chen, H.C. Chang, Chinese Materia—A Concise Guide, Modern Drug Press, Taipei, 1984, p. 95.
2. G.J. Xiu, Sheng Yao Xue, Medicinal Materials, in Chinese, People’s Medical Publication House, Beijing, China, 1995, p. 172.
3. S.Y. Huang, A Collective Commentary to Herbal Formulas, Ba-Teh Education and Culture Press, Taipei, 1987, p. 1.
4. Drugs in Japan, Japan Pharmaceutical Information Centre, 9th Edition, Tokyo, Japan, 1985, p. 12.