1. Chan, H. and Tang, C. S., in this proceedings.
2. Indian Council of Medical Research, in “Medical Plants of India, Vol. I”, p. 185. New Delhi 1976.
3. “Medical Plants of the Philippines”;Quisumbing,1951
4. “Medicinal and Poisonous Plants of Southern and Eastern Africa”;Watt,1962
5. Some Organic Sulfur Compounds in Vegetables and Fodder Plants and their Significance in Human Nutrition