Guliyev, I. A., E. T. Mekhdiev, I. I. Litvinyuk, A. V. Bondarenko, and A. R. Yanguzin. “Global Refining Industry in Retrospect, and Evaluation of Russia-EU Petroleum Products’ Trade Perspectives”. International Journal of Energy Economics and Policy, vol. 7, no. 5, Nov. 2017, pp. 209-16, https://econjournals.com/index.php/ijeep/article/view/5618.