Metelev, Aleksej V, and Olga M. Maslova. “EXISTENTIAL CAUSES FOR EXTREME TOURISM (INTERPRETATION, DEVELOPMENT AND APPLICATION OF K. JASPERS” PHILOSOPHICAL IDEAS)”. Siberian Journal of Tourism and Economic 1, no. 10 (June 28, 2019): 4-11. Accessed December 22, 2025. https://journal.asu.ru/st/article/view/6218.