Yamashkin, Stanislav A.; Radovanović, Milan M.; Yamashkin, Anatoliy A.; Barmin, Alexander N.; Zanozin, Viktor V.; Petrović, Marko D. (Oradea: University of Oradea, Department of Geography, Tourism and Territorial Planning
Gdansk : Gdansk University of Physical Education and Sport, Faculty of Tourism and Recreation, 2019)