1. Australian Agricultural Council, 1990. Feeding standards for Australian livestock. AAC, Ruminant sub-committee CSIRO. Eastern Melbourne, Australia.
2. Milk production from napier grass (Pennisetum purpureum) in a zero-grazing feeding system;Anindo;E. Afr. Agric. For. J.,1986
3. Association of Official Analytical Chemists, 1990. Official Method of Analysis, 14th Edition. AOAC, Arlington, VA.
4. Agricultural Research Council, 1984. The Nutrient Requirements of Ruminant Livestock (Suppl. 1). ARC, Commonwealth Agricultural Bureaux, Farnham Royal, UK.
5. Hvelplund, T., Madsen, J., 1990. A Study of the Quantitative Nitrogen Metabolism in the Gastro-Intestinal Tract and the Resultant New Protein Evaluation System for Ruminants. The AAT–PBV System, 215 pp.