Guliyev, Igbal A., et al. “Establishment and Marketing of New Oil Benchmarks in the Structure of Global Oil and Oil Products Mercantile Trade: The Russian Case”. International Journal of Energy Economics and Policy, vol. 8, no. 2, Mar. 2018, pp. 95-101, https://econjournals.com.tr/index.php/ijeep/article/view/5977.