Yavorska, V., V. Sych, K. Kolomiyets, and A. Shashero. 2018. “Odessa Catacombs As an Integral Part of the Tourist Image of the Black Sea Region”. Journal of Geology, Geography and Geoecology 26 (1), 219-26. https://doi.org/https://doi.org/10.15421/111822.