Bordilovska, Olena. “Ukraine’s Geopolitical Choice: Historical Aspects . 63”. Eastern Chessboard: Geopolitical Determinants and Challenges in Eastern Europe and the South Caucasus, edited byPiotr Bajor and Kamila Schöll-Mazurek, vol. Societas, Vol. 88, Księgarnia Akademicka Publishing, 2015, https://doi.org/10.12797/9788376386706.05.