1. R. D. Gaur, Flora of District Garhwal, 1st Edition, Trans Media Publication, Srinagar Garhwal, 1999, p. 186.
2. K. R. Kirtikar and B. D. Basu, Indian Medicinal Plants, Lalitmohan Basu Publication, Allahabad, 3, 2364 (2003).
3. M. X. Liu, H. Y. Liu, Y. N. Zheng, and X. G. Li, J. Jilin Agricult. Univ., 19, 115 (1997).
4. Y. Shao, M. F. Lahloub, and B. Meier, Planta Med., 55, 617 (1989).
5. H. Lee, N. Watanabe, T. Sasaya, and S. Ozawa, Mokuzai Gakkaishi, 39, 1409 (1993).