1. Association of Official Agricultural Chemists. 1965. Official methods of analysis, 10th ed. Washington, D. C.
2. The utilization of protein as a source of energy in fattening sheep;Blaxter;British J. Nutr.,1962
3. Milk production response to supplementation with encapsulated methionine per Os or casein per abomasum;Broderick;J. Dairy Sci.,1970
4. Chalupa, W., and J. E. Chandler. 1972, Amino acid nutrition of ruminants. Page 107 in Tracer studies on non-protein nitrogen for ruminants. UNIPUB, Inc., P. O. Box 433, New York, N.Y.
5. Amino acid nutrition of growing cattle;Chalupa;Fed. Proc.,1972