1. K. R. Kirtikar and B. D. Basu, Indian Medicinal Plants, Lalit Mohan Basu and Co., Allahabad, Vol. 1, 1975, p. 381.
2. R. N. Chopra, S. L. Nayar, and I. C. Chopra, Glossary of Indian Medicinal Plants, CSIR, New Delhi, 1971, p. 128.
3. A. S. R. Anjaneyulu and S. V. Murty, Planta Med., 32, 247 (1977).
4. M. Hor, M. Heinrich, and H. Rimpler, Phytochemistry, 42, 109 (1996).
5. S. S. Subramanian and M. N. Swamy, Curr. Sci., 32, 308 (1963).