TY JOUR TI SOUTHERN BELT OF OIL AND GAS DEVELOPMENT IN EASTERN SIBERIA: STRUCTURE OF LICENSE OWNERSHIP, ACCESS TO KEY FIELDS, AND ESTIMATED PRODUCTION INDICATORS KW Eastern Siberia KW Southern Belt of Oil and Gas Development KW license ownership structure KW major fields KW infrastructure connectivity KW ESPO (Kuyumba–Taishet) KW Power of Siberia KW spatial analysis KW indicative estimates KW open-source data aggregation JO MOSCOW ECONOMIC JOURNAL AU Kruchinin, I.S. PY 2025 IS 10 PB Electronic science