Afanasieva , Tatiana V., and Aida Kh. Kazanbieva. “Approach to Assessing the Digital Economy Development Based on Clustering of Russian Regions”. Economy of Regions 18, no. 4 (December 28, 2022): 1075–1088. Accessed April 28, 2026. https://www.economyofregions.org/ojs/index.php/er/article/view/397.