Мовчан, У. І. “FACTOR OF „ENERGY PRESSURE” IN UKRAINE- RUSSIA RELATIONS DURING 2005-2006”. The Journal of V.N. Karazin Kharkiv National University. Issues of Political Science, no. 1060, June 2013, pp. 242-8, https://periodicals.karazin.ua/politology/article/view/2952.