Askerov , Nizami S., Olga Yu. Trofimenko, and Sergei I. Shanygin. “The North Caucasus and Caspian Regions: A Methodological Approach to Development Evaluation and Interregional Comparison”. Economy of Regions 22, no. 1 (March 23, 2026): 29–44. Accessed May 24, 2026. https://www.economyofregions.org/ojs/index.php/er/article/view/1126.