1. Abdalla, A.L., Louvandini, H., Bueno, I.C., Vitti, D.M., Meireles, C.F. and Gennari, S.M., 1999. Constraints to milk production in grazing dairy cows in Brazil and management strategies for improving their productivity. Preventive Veterinary Medicine, 38, 217–230
2. Belkhou, R., Cherel, Y., Heitz, A., Robin J.P. and Le Maho Y., 1991. Energy contribution of proteins and lipids during prolonged fasting in the rat. Nutrition Research, 11, 365–374
3. Bogaerts, D.F., Fiems, L.O., Cottyn, B.G., Uytterhaegen, L., Demeyer, D. and Boucqué, C.V., 1996. Effect of protein and energy level on performance, carcass and meat quality of finishing Belgian White-Blue double-muscled bulls. In: A.V. Portugal (ed.), Proceedings of the 7th International Symposium on Protein Metabolism and Nutrition, Vale de Santarém, Portugal, 1996, 467–471
4. Butterworth, M.H., 1984. Beef Cattle Nutrition and Tropical Pastures, (Longman Group, London)
5. Casey, N.H. and van Niekerk, W.A., 1988a. The Boer goat. I. Origin, adaptability, performance testing, reproduction and milk production. Small Ruminant Research, 1, 291–302