Petrov, Yuriy V., and Boris I. Kochurov. “Diff Erentiation of Resource-Producing Regions of the Russian Federation in the New Geo-Economic Conditions”. Proceedings of Voronezh State University. Series: Geography. Geoecology0, no. 1 (February 20, 2025): 49-56. Accessed December 15, 2025. https://journals.vsu.ru/geo/article/view/12847.