A. Ugen, M., A. Namayanja, F. Opio, P. Tukamuhabwa, and R. S. Ssekabembe. “Participatory Evaluation of Improved Technologies With Farmers: The Case of Bean Technologies”. Uganda Journal of Agricultural Sciences, vol. 8, no. 10, Jan. 2003, pp. 123-30, http://journal.naro.go.ug/index.php/ujas/article/view/442.