- Kamra, D.N., Agarwal, N. and Yadav, M.P. 2004. Methanogenesis in the rumen and the green house effect on the environment. Livestock International, 8 (9): 2, 5-8.
- PERERA, B.M.A.O., ABEYGUNAWARDENA, H., VALE, W.G. & CHANTALAKHANA, C. (2004) Buffalo. Chapter in Book: Livestock and Wealth Creation - Improving the Husbandry of Animals Kept by Poor People in Developing Countries, Livestock Production Programme, Natural Resources International Limited, United Kingdom (In Press).