Юрченко, С., Е. Юрченко, and А. Кондрова. “The Features of Development of Modern Marine Cruise Tourism”. The Journal of V. N. Karazin Kharkiv National University. Series: International Relations. Economics. Country Studies. Tourism, no. 4 (1144, 2, 1, pp. 185-9, https://periodicals.karazin.ua/irtb/article/view/4549.