Zahorulko, V. M., O. V. Kovalenko, and N. V. Skydanenko. “TRENDS IN THE DEVELOPMENT OF TOURIST BUSINESS IN UKRAINE”. Science and Transport Progress , no. 18 (October 25, 2007): 199–201. Accessed May 4, 2024. https://stp.ust.edu.ua/article/view/17497.