1. Abreu, A., Carulla, J.E., Lascano, C.E., Diaz, T.E., Kreuzer, M. and Hess, H.D., 2004. Effects of Sapindus saponaria fruits on ruminal fermentation and duodenal nitrogen flow of sheep fed a tropical grass diet with and without legume, Journal of Animal Science, 82, 1392–1400.
2. Alexander, G., 2005. Effect of plant extract on rumen fermentation and nutrient utilization in sheep. Ph.D thesis Submitted to IVRI (Deemed University), Izatnagar, U.P., India.
3. Berhane, M., 2000. Studies on feeding some indigenous galactpoietic feed supplement on performance of crossbred cows. M.Sc. thesis submitted to JNKVV, Jabalpur (MP). India.
4. Cavestany, D., Blanc, J.E., Kulcsar, M., Uriarte, G., Chilibroste, P., Meikle, A., Febel, H., Ferraris, A. and Krall, E., 2005. Studies of the transition cow under a pasture-based milk production system: metabolic profiles, Physiology Pathology Clinical Medicine, 52, 1–7.
5. Church, D.C. and Pond. W.G., 1988. Basic Animal Nutrition and Feeding. 3rd Ed. John Wiley and Sons. New York, Chichester, Brisbane, Toronto, Singapore.