Bordilovska, Olena. «Ukraine’s Geopolitical Choice: Historical Aspects . 63». в 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. Societas. Poland: Księgarnia Akademicka Publishing, 2015. просмотрено ноябрь 6, 2026. https://books.akademicka.pl/publishing/catalog/book/396/chapter/8859.