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Belikova, H. and Shcherban, A. 2025. 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’. 40, (Jun. 2025), 6-17. DOI:https://doi.org/10.26565/2227-6505-2025-40-01.