1. Association of Official Analytical Chemists. 1975, Official methods of analysis. 12th ed. Washington, DC.
2. Rations and feeding methods for tomorrow's cows;Bath,1971
3. Effect of pelleting on rate of concentrate consumption by dairy cows;Blosser;J. Dairy Sci.,1959
4. Feeding high energy rations for various length of lactation;Brown;J. Dairy Sci.,1974
5. Feeding methods and grouping systems;Coppock;J. Dairy Sci.,1977