Kleiner, Georgy Borisovich, and Maksim Aleksandrovich Rybachuk. “System Balance of the Russian Economy: Regional Perspective”. Economy of Regions 15, no. 2 (June 28, 2019): 309–323. Accessed April 24, 2026. https://economyofregions.org/ojs/index.php/er/article/view/1852.