1. Assan N (2013). Estimates of genetic, environment and phenotypic trends in indigenous Nguni cattle of Zimbabwe: Implication for management and breeding program. Journal Animal Science 12:360-368.
2. Assan N (2010). Direct and maternal genetic effects and trends for weaning weight in local Tuli cattle of Zimbabwe. International Journal of Tropical Agriculture and Food Systems 3:206-216.
3. Baker RL, Morris CA, Johnson DL, Hunter JC, Hickey SM (1991). Results of selection for yearling or 18-month weight in Angus and Hereford cattle. Livestock Production Science 29:277-296.
4. Beffa LM (2005). Genotype X environment interaction in Afrikaner cattle. PhD Thesis, Department of Animal, Wildlife and Grasslands, University of the Free State, Bloemfontein, South Africa.
5. Boligon AA, Carvalheiro R, Albuquerque LG (2013). Evaluation of mature cow weight: Genetic correlations with traits used in selection indices, correlated responses, and genetic trends in Nelore cattle. Journal of Animal Science 91:20-28.