Rybakovsky, Oleg L., and Tamara A. Fadeeva. “Structural Demographic Waves of Russian Regions: Preliminary Analysis”. Living Standards of the Population in the Regions of Russia 18, no. 4 (December 27, 2022): 425-438. Accessed April 17, 2025. https://jour.fnisc.ru/index.php/vcugjournal/article/view/9382.