Ogujiuba, Kanayo, and Nancy Stiegler . “Efficiency of Capital-Labor in Nigeria’s Mining Sector: A Cobb-Douglas Framework”. Journal of Economics and Behavioral Studies 6, no. 9 (September 30, 2014): pp. 760-770. Accessed May 18, 2024. https://ojs.amhinternational.com/index.php/jebs/article/view/535.