Lanyasunya, T.P., Wang, H. Rong, E.A. Mukisira, and S.A. Abdulrazak. 2006. “Performance of Dairy Cows in Different Livestock Production Systems on Smallholder Farms in Bahati Division, Nakuru District, Kenya”. Pakistan Journal of Nutrition 5 (2): 130-34. https://doi.org/10.3923/pjn.2006.130.134.