“Tourism Development in the Countries of the Western Black Sea Coast (Romania аnd Bulgaria) and Their Cooperation With Ukraine”. The Journal of V. N. Karazin Kharkiv National University. Series: International Relations. Economics. Country Studies. Tourism, no. 15 (August 1, 2022): 68–80. Accessed October 25, 2026. https://periodicals.karazin.ua/irtb/article/view/20845.