HARMS, E., SUKHOVA, M., KOCHEEVA, N., MINAEV, A., & KARANIN, A. (2016). On the Concept of Sustainable Recreational Use of Natural Resources of Cross- Border Areas of Altai. Journal Of Environmental Management And Tourism, 7(2), 313-320. Retrieved from https://journals.aserspublishing.eu/jemt/article/view/337