Orovwode, H. E., S. Matthew, E. Amuta, F. A. Agbetuyi, and I. Odun-Ayo. “Carbon Footprint Evaluation and Environmental Sustainability Improvement through Capacity Optimization”. International Journal of Energy Economics and Policy, vol. 11, no. 3, Apr. 2021, pp. 454-9, https://www.econjournals.com/index.php/ijeep/article/view/10209.