Ермаков, Георгий, and Юлия Секунова. “DIPLOMATIC PROTOCOL OF UKRAINE WITH POLAND”. SWorldJournal 4, no. 08-04 (May 31, 2021): 136–139. Accessed April 30, 2024. https://www.sworldjournal.com/index.php/swj/article/view/swj08-04-076.