Nazar Zatorskyy. “THE EMBASSY TO THE POPE SIXTUS IV WITH THE EPISTLE OF MISAEL IN THE LIGHT OF SOME DOCUMENTS FROM THE VATICAN SECRET ARCHIVES”. International Relations of Ukraine: Scientific Searches and Findings, no. 26 (November 27, 2017): 11–30. Accessed July 26, 2026. https://mzu.history.org.ua/index.php/MZU/article/view/13.