Larchenko, L. V., R. A. Kolesnikov, G. P. Tumanova, and V. A. Kibenko. “Economic Problems of Exploring Hydrocarbons in Russian Northern Provinces in the Context of International Interests”. International Journal of Energy Economics and Policy, vol. 6, no. 3, July 2016, pp. 529-36, https://www.econjournals.com/index.php/ijeep/article/view/2678.