1. S. Foster and J. A.Duke , A Field Guide to Medicinal Plants and Herbs of Eastern and Central North America The Peterson Field Guide Series , Houghton Mifflin Company , Boston , 2nd edn, 2000 , pp. 268–269
2. L. M. Perry , Medicinal Plants of East and Southeast Asia: Attributed Properties and Uses , MIT Press , Cambridge , 1980 , p. 370
3. Z. Xie and X.Huang , Dictionary of Traditional Chinese Medicine , Commercial Press , Hong Kong , 1984 , p. 175
4. S. Y. Hu , Food Plants of China , Chinese University Press , Hong Kong , 2005 , p. 504