1. Partial substitution of alfalfa hay with grass hay (Sudangrass, Elephant Grass) in diets for lactating dairy cattle: dry matter intake, lactation performance and digestive function;Alvarez;J. Anim. Vet. Adv.,2005
2. Official Methods of Analysis;AOAC,1986
3. Official Methods of Analysis;AOAC,2000
4. Effects of roughage source and level in finishing diets containing wet distillers grains on feedlot performance;Benton;J. Anim. Sci.,2007
5. Effect of ration on the nutritive quality of rumen microbial protein;Bergen;J. Anim. Sci.,1968