TY JOUR TI CONFIGURATION OF TURKEY'S GAS TRANSPORT INFRASTRUCTURE: POTENTIAL AND LIMITATIONS OF GAS HUB FORMATION KW Turkey KW gas hub KW energy security KW pipelines KW TANAP KW Turkish Stream KW LNG KW gas transit KW hydrogen KW global economy JO MOSCOW ECONOMIC JOURNAL AU Verpahovskiy, G.A. PY 2026 IS 11 PB Electronic science