Kassie, Girma T, Debrah Maleni, Simon Gwara, and Bezabih Emana. “Efficiency of Moisture Stress Risk Coping Strategies in North Eastern Ethiopia: Application of Mean-Variance Efficiency Analysis”. Asian Economic and Financial Review 3, no. 8 (August 14, 2013): 1018–1032. Accessed November 25, 2024. https://archive.aessweb.com/index.php/5002/article/view/1068.