TY JOUR TI ECONOMIC EFFICIENCY OF MUNICIPAL ENTITIES IN REMOTE ISLANDS OF THE HELLENIC REPUBLICFOR THE PERIOD 2020 - 2025 KW municipal entities KW island territories KW Hellenic Republic KW islands specifics KW insularity KW local government KW Kallikratis KW financial efficiency KW tourism JO MOSCOW ECONOMIC JOURNAL AU Goncearuc, A.G. PY 2026 IS 11 PB Electronic science