1. AFRC (Agricultural and Food Research Council), 1995. Energy and Protein Requirements of Ruminants, An advisory manual prepared by the AFRC Technical Committee on Responses to Nutrients, (CAB (Centre for Agriculture and Biosciences) International, Wallingford, UK).
2. Amer, P.R., Mpofu, N. and Bondoc, O., 1998. Definition of breeding objectives for sustainable production systems. In: Proceedings of the Sixth World Congress on Genetics Applied to Livestock Production, 11–16 January 1998, Armidale, NSW, Australia, vol. 28, 97–104.
3. Amer, P.R., Simm, G., Keane, M.G., Diskin, M.G. and Wickham, B.W., 2001. Breeding objectives for beef cattle in Ireland. Livestock Production Science, 67, 223–239.
4. Ayalew, W., Rischkowsky, B., King, J.M. and Bruns, E., 2003. Crossbreds did not generate more net benefits than indigenous goats in Ethiopian smallholdings. Agricultural Systems, 76, 1137–1156.
5. Baker, R.L. and Rege, J.E.O., 1994. Genetic resistance to diseases and other stresses in improvement of ruminant livestock in the tropics. In: Proceedings of the Fifth World Congress on Genetics Applied to Livestock Production, University of Guelph, Ontario, Canada, 7–12 August 1994, vol. 20, 405–412.