I. A. Guliyev, 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”, IJEEP, vol. 7, no. 5, pp. 209–216, Nov. 2017.