1. Energy and Protein Requirements of Ruminants;AFRC – Agricultural Food and Research Council,1993
2. The nutrition of goats. Nutrition Abstracts and Reviews (Series B);AFRC - Agricultural Food and Research Council,1997
3. The nutrition of goats. Technical committee on responses to nutrients, report 10,1998
4. Breed differences in water metabolism and body composition of sheep and goats;Aganga;J. Agric. Sci.,1989
5. AOAC - Association of Official Analytical Chemistry, 1990. Official Methods of Analysis, 15th ed. Washington, DC, USA.