Ramaru, J., J. Hagmann, E. Chuma, P. Ficarelli, M. Netshivhodza, and Z. Mamalobo. 2004. “Building Linkages and Bargaining Power Between Smallholder Farmers and Service Providers: Learning from a Case on Soil Fertility Inputs in South Africa”. Uganda Journal of Agricultural Sciences 9 (1):204-14. http://journal.naro.go.ug/index.php/ujas/article/view/313.