Yavorska, V., and E. Nikolaeva. “Methodological Bases and Principles of Systematics of Territorial Organization of Recreational and Tourist Activities of the Region”. Journal of Education, Health and Sport 7, no. 7 (July 31, 2017): 1150–1164. Accessed July 18, 2024. https://apcz.umk.pl/JEHS/article/view/5097.