1. Official Methods of Analyses;AOAC,1975
2. Instat Introductory Guide;Burn,1987
3. The digestibility of tropical grasses;Butterworth;Nutr. Abstr. Rev.,1967
4. Tropical Pasture and Fodder plants;Bodgan,1977
5. Microbial degradation in the digestive tract;Chesson,1984