Osinubi, Tokunbo S., et al. “Assessing the Optimal Capital Structure: A Case Study of Afren Public Limited Company - a Small Exploration and Production Oil and Gas Company”. Journal of Management, Economics, and Industrial Organization, vol. 3, no. 1, Jan. 2019, pp. 25-50., https://doi.org/10.31039/jomeino.2019.3.1.3.