Kryvonos, Roman. «Changes in the European System of International Relations due to the “Ukrainian Crises” of 2014-15 . 89». Eastern Chessboard: Geopolitical Determinants and Challenges in Eastern Europe and the South Caucasus, под редакцией Piotr Bajor и Kamila Schöll-Mazurek, т. Societas, Vol. 88, Księgarnia Akademicka Publishing, 2015, https://doi.org/10.12797/9788376386706.08.