1. Energy and Protein Requirements of Ruminants;AFRC (Agricultural and Food Research Council),1993
2. Predicting amino acid adequacy of diets fed to Holstein steers;Ainslie;J. Anim. Sci.,1993
3. Official Methods of Analysis;AOAC International,2000
4. The Nutrient Requirements of Ruminant Livestock;ARC (Agricultural Research Council),1980
5. Regulation of Macronutrient Partitioning between Maternal and Conceptus Tissues in the Pregnant Ruminant;Bell,2000