1. Dibbits, H. J. (1991). Harnessing systems for donkeys; experiences from Kenya. In:Donkeys, Mules and Horses in Tropical Agricultural Development. (Eds. D. Fielding and R. A. Pearson), University of Edinburgh, pp 266–274.
2. Elliot, R. C. (1984). Some nutritional factors influencing the productivity of beef cattle. PhD thesis, University of London.
3. FAO (1972). Employment of draught animals in agriculture. Issued by arrangement with CEEMAT, Food and Agricultural Organisation of the United Nations, Rome, Italy.
4. FAO (1984). SADCC Agriculture: Towards 2000. Food and Agricultural Organisation of the United Nations, Rome, Italy.
5. GFA (1987). Study on the economic and social determinants of livestock production in the communal areas of Zimbabwe. Department of Veterinary Services, Ministry of Agriculture, Zimbabwe.