1. Computer-formulated least-cost concentrate mixes for dairy cows;Bath;J. Dairy Sci.,1968
2. Blaxter, K. L. 1962. The Energy Metabolism of Ruminants. C. C Thomas, Springfield, Illinois. pp. 172-173.
3. Dean, G. W. 1966. Economics of concentrate-roughage feeding in milk production. Fifth Annu. Dairy Cattle Day, January, 1966. University of California, Davis, pp. 18-29.
4. Linear Programming Methods;Heady,1958
5. Milk production functions;Heady;Iowa Agr. Exp. Sta., Res. Bull.,1956