T. S. Osinubi, L. Amaghionyeodiwe, and C. C. Okoye, “Assessing the optimal capital structure: A case study of Afren public limited company - a small exploration and production oil and gas company”, Jomeino, vol. 3, no. 1, pp. 25–50., Jan. 2019, doi: 10.31039/jomeino.2019.3.1.3.