“Application of Stochastic Frontier Production Function to Separate the Effect of Random Variation in Output from Inefficiency in the Agricultural Production of African Countries” (2018) Singaporean Journal of Business Economics and Management, 6((9), pp. 32–40. Available at: https://singaporeanjbem.com/index.php/SJBEM/article/view/454 (Accessed: 16 July 2026).