Чугуй, Тарас. 2016. “Political Activity of the First Galich-Volyn Prince Roman Mstislavovich”. V. N. Karazin Kharkiv National University Bulletin ‘History of Ukraine. Ukrainian Studies: Historical and Philosophical Sciences’ 21 (September), 6-20. https://periodicals.karazin.ua/uahistory/article/view/6048.