Bigirwa, G., K. F. Cardwell, T. Sengooba, D. T. Kyetere, A. Nakayima, and S. B. Kaboyo. “Gray Leaf Spot Disease in Uganda”. Uganda Journal of Agricultural Sciences, vol. 6, no. 1, Jan. 2001, pp. 43-46, http://journal.naro.go.ug/index.php/ujas/article/view/421.