Mytz, Viktor L. “Ruler of Theodoro Principality Isaac (1465–1475): Few Details to Complete the Historical Picture”. Via in tempore. History and political science 48, no. 3 (November 12, 2021): 614–626. Accessed July 3, 2024. https://via-in-tempore-journal.ru/index.php/journal/article/view/163.