McDonald P., Edwards R.A., Greenhalgh J.F.D., Morgan C.A., (2002) Animal Nutrition. 6th Ed. Pearson Education Limited, UK null
Cheeke P.R., (2004) Applied Animal Nutrition - Feeds and Feeding. Macmillan Publishing Company, NY, USA. null
Secundária
Moughan PJ, Verstegen M W A, Visser-Reyneveld MI, (2000) Feed evaluation – Principles and practice. Wageningen Academic Publishers, The Netherlands null
Jarrige R, Ruckebusch Y, Demarquilly C, Farce M-H, Journet M, (1995) Nutrition des ruminants domestiques ingestion et digestion. INRA, Paris null
Van Soest, P, (1994) Nutritional Ecology of the Ruminant. 2Ed., Cornell Univ Press, USA null
AFRC, (1993) Energy and Protein Requirement of Ruminants. CAB International, UK, 159p null
INRA (1987) Alimentation des Ruminants: revision des systémes et des tables de l´INRA. Bull. Tech., CRZN, Theix 70 null