1. ASAE (1967 ) Recommendation A.S.A.E.R. 2461 Method of determining modulus of uniformity and modulus of fineness of ground feed . Yearbook of the American Society of Agricultural Engineers, p.301 .
2. Further studies on the changing composition of the digesta along the alimentary tract of the sheep
3. D.E. Beever(1969 ) Studies on the digestion of the carbohydrate fractions of forage and cereal diets, by sheep . Ph.D. Thesis , University of Newcastle-upon-Tyne.
4. D.E. Beever, and R.A. Terry(1975 ) Annual Report 1974, Grassland Research Institute, Hurley, p.68 .