PAHIRIA, Oleksandr. “THE UKRAINIAN QUESTION IN THE FOREIGN POLICY OF THE SECOND POLISH REPUBLIC AT THE TURN OF 1938 – 1939”. EAST EUROPEAN HISTORICAL BULLETIN, no. 30 (March 28, 2024): 131–145. Accessed April 5, 2025. http://eehb.dspu.edu.ua/article/view/299910.