1. Additive and nonadditive genetic effects on milk production in dairy cattle: evidence for major individual heterosis;Ahlbom-Breier;J. Dairy Sci.,1991
2. Selection methods used in the development of the AFS breed of tropical dairy cattle;Alexander,1990
3. Cunningham, E. P., and O. Syrstad. 1987. Crossbreeding Bos indicus and Bos taunts for milk production in the tropics. Food Agric. Org. Anim. Prod. Health Paper No. 68., Food Agric Org., United Nations, Rome, Italy.
4. Rotation crossbreeding with Sahiwal and Ayrshire cattle in the tropics;Gregory;J. Dairy Sci.,1981
5. Heterosis, crossbreeding and composite breed utilization in the tropics;Gregory,1982