1. Suwal, P. N. Medicinal Plants of Nepal. Ministry of Forests, Department of Medicinal Plants, Thapathali, Kathmandu, Nepal 1970.
2. Quisumbing, E. Medicinal plants of the Philippines. Tech Bull 16, Rep Philippines, Dept Agr Nat Resources, Manila 1951; 1.
3. Schifferli, E. Abortion and attempted abortion with plant substances. Ditsch Z Ges Gerichtl Med 1939; 31: 239.
4. Boyd, L. J. The pharmacology of the homeopathic drugs. I. J Amer Inst Homeopathy 1928; 21: 7.
5. Mukerji, B. The Indian Pharmaceutical Codex. Volume 1 — Indigenous Drugs. Council of Scientific and Industrial Research, New Delhi, India, 1953.