Bakulina, A. A., O. V. Panina, S. E. Prokofiev, N. L. Krasyukova, V. L. Abramov, N. V. Sergeeva, O. V. Loseva, T. G. Kasyanenko, and E. V. Takmakova. “The Black Sea Region Energy Cooperation: Current Trends and Prospects”. International Journal of Energy Economics and Policy, vol. 11, no. 4, June 2021, pp. 257-66, https://www.econjournals.com/index.php/ijeep/article/view/11247.