Ziryanov, A. I., A. Y. Korolev, S. E. Mishlavtceva, and A. A. Safarian. “Approaches to Active Tourism in the Urals and in Perm Krai”. Turyzm/Tourism, vol. 26, no. 1, June 2016, pp. 79-84, doi:10.1515/tour-2016-0007.