Ручинская, О. “Agonistic Festivals in the Ancient Cities of the Northern and Western Black Sea Coast: History of Studying the Problem and Its Current Research”. The Journal of V. N. Karazin Kharkiv National University. Series: History, no. 51, Dec. 2017, pp. 13-23, https://periodicals.karazin.ua/history/article/view/9855.