Holovko, Oleksandr. “THE MONGOL FACTOR IN THE RELATIONS OF THE VOLYN PRINCE AND REX DANYLO ROMANOVYCH WITH THE APOSTOLIC SEE (LATE 40S – FIRST HALF OF THE 60S OF THE 13TH CENTURY)”. Drinovsky sbornik 16 (February 12, 2024). Accessed December 6, 2025. https://periodicals.karazin.ua/drinov/article/view/23194.