Зайцева, Ю. В., and М. А. Латышева. “Study of Differentiation of Russian Regions According to the Level of Socio-Economic Development Using the Simplest Indicators”. Modern Economics: Problems and Solutions 2 (April 5, 2015): 6-15. Accessed December 5, 2025. https://journals.vsu.ru/meps/article/view/4192.