Ssewannyana, E., and B. Mukasa. “Assessment of the Potential Productivity of Pigs in the Teso and Lango Farming Systems, Uganda: A Case Study”. Uganda Journal of Agricultural Sciences, vol. 9, no. 1, Sept. 2004, pp. 549-53, http://journal.naro.go.ug/index.php/ujas/article/view/264.