1. Abraham A, Vatsala P (1981) Introduction to Orchids, with illustrations and descriptions of 150 South Indian Orchids. TPGRI, Trivandrum
2. Anonymous (1959) Preliminary observations on the treatment of haemorrhage of digestive ulcers with sepium and Bletilla hycinthina. Zhonghua Nei Ke Za Zhi 7(1):9
3. Anonymous (1974) Barefoot doctors' manual. National Institutes of Health, Bethesda
4. Anonymous (1989) Medicinal plants of China. Selection of 150 commonly used species. WHO pacific series no. 2. Regional Office of the Pacific, Manila
5. Anonymous (2004) The new century Chinese-english dictionary of traditional Chinese medicine. People’s Military Medical Press, Beijing