E. SIGAREVA, S. SIVOPLYASOVA, and S. RYAZANTSEV, “DEMOGRAPHIC SITUATION IN THE NORTHERN CAUCASUS: CURRENT STATE AND FUTURE PROSPECTS”, CAC, vol. 20, no. 2, pp. 119–140, Apr. 2019, Accessed: Aug. 14, 2025. [Online]. Available: https://www.ca-c.org/index.php/cac/article/view/1458