V. O. Oorzhak and G. F. Balakina, “International research conference ‘Regional economy: technologies, economy, ecology and infrastructure’ (Kyzyl, 14-15 Oct 2015)”, НИТ, no. 2, Jun. 2016, Accessed: Mar. 03, 2026. [Online]. Available: https://nit.tuva.asia/nit/article/view/104