Vovk, R. (2021) „The Eastern Flank of Europe: Ukraine’s Place in the Collective Security System . 69”, w Bajor, P. (red.) Eastern Partnership: The Role and Significance in the Process of Transformation of the Countries of Eastern Europe and the South Caucasus. Poland: Wydawnictwo Księgarnia Akademicka. doi:10.12797/9788381386425.05.