Lawanson, Akanni Olayinka, and Jacob Novignon. “Comparative Analysis of SFA and DEA Models: An Application to Health System Efficiency in SSA”. Asian Journal of Humanities and Social Studies 5, no. 1 (February 15, 2017). Accessed January 24, 2021. https://www.ajouronline.com/index.php/AJHSS/article/view/4373.