Biftu, A. ., B. . Diriba, and A. . Sida. “Pre-Extension Demonstration of Improved Durum Wheat Technologies in Bale and West Arsi Zones, Southeastern Oromia, Ethiopia”. Scientific Journal of Crop Science, vol. 6, no. 9, Sept. 2017, pp. 204-12, http://sjournals.com/index.php/sjcs/article/view/308.