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DEMCHYSHAK R, STARODUB T. PLACE OF UKRAINE IN THE SECURITY SYSTEM OF THE REGION OF CENTRAL AND EASTERN EUROPE IN THE UKRAINIAN NATIONALISM THEORISTS’ WORKS (the 20–30s of the XXth century). EEHB [Internet]. 2021Sep.30 [cited 2024Nov.22];(20). Available from: http://eehb.dspu.edu.ua/article/view/240016