Miho , A. . “Comparing Technical Efficiency of Maize Smallholder Farmers in Tabora and Ruvuma Regions of Tanzania: A Frontier Production Approach”. Asian Journal of Agriculture and Rural Development, vol. 7, no. 9, Apr. 2018, pp. 180-97, doi:10.18488/journal.1005/2017.7.9/1005.9.180.197.