Lemessa, S. D., M. A. Yismawu, M. D. Daksa, and M. D. Watabaji. “Risk Adjusted Production Efficiency of Maize Farmers in Ethiopia: Implication for Improved Maize Varieties Adoption”. Turkish Journal of Agriculture - Food Science and Technology, vol. 5, no. 9, Sept. 2017, pp. 1099-07, doi:10.24925/turjaf.v5i9.1099-1107.1339.