Ziryanov, A.I., Korolev, A.Y., Mishlavtceva, S.E. and Safarian, A.A. 2016. Approaches to active tourism in the Urals and in Perm Krai. Turyzm/Tourism. 26, 1 (Jun. 2016), 79–84. DOI:https://doi.org/10.1515/tour-2016-0007.