1. Energy and Protein Requirements of Ruminants. An Advisory Manual Prepared by the AFRC Technical Committee on Responses to Nutrients;AFRC (Agricultural and Food Research Council),1993
2. Official Method of Analysis;AOAC (Association of Official Analytical Chemists),1990
3. The nutrient requirements of ruminant livestock;ARC (Agricultural Research Council),1980
4. Strategies to reduce methane emissions from farmed ruminants grazing on pasture;Buddle;Vet. J.,2011
5. Effects of feeding level on methane emissions and energy utilization of Brahman cattle in the tropics;Chaokaur;Agric. Ecosyst. Environ.,2015