1. Belikova H., Shcherban A. A. Westerfeld’s drawing “Meeting of Bohdan Khmelnytsky’s Ambassadors with Janusz Radziwill” as a historical source // V. N. Karazin Kharkiv National University Bulletin ‘History of Ukraine. Ukrainian Studies: Historical and Philosophical Sciences’. 2025. (40). C. 6-17.