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. Annor, S.Y., 1996. Development of a breeding objective for beef cattle in ghana, (MSc thesis, Massey University, New Zealand).
5. Baker, R.L. and Gray, G.D., 2005. Appropriate breeds and breeding schemes for sheep and goats in the tropics: the importance of characterising and utilising disease resistance and adaptation to tropical stresses. In: R. Sani, G.D. Gray and R.L. Baker (eds), Better Worm Control for Small Ruminants in Tropical Asia, (Australian Centre for International Agricultural research (ACIAR), Monograph 113), 63–69.