Sharf, Irina, and Alexander Mikhalchuk. “Reproduction Processes in Subsoil Use As the Basis for Sustainable Socio-Economic Development of Oil-Producing Regions”. Economy of Regions 17, no. 4 (December 29, 2021): 1286–1301. Accessed May 21, 2024. https://www.economyofregions.org/ojs/index.php/er/article/view/90.