Bagais, O., K. Aljaaidi, and A. Alothman. “An Empirical Investigation of the Associations of Short and Long Debt Policies with’ Economic Values of Energy Sector”. International Journal of Energy Economics and Policy, vol. 11, no. 1, Dec. 2020, pp. 249-54, https://www.econjournals.com/index.php/ijeep/article/view/10498.