BUGAYKO, Dmytro, Yuri KHARAZISHVILI, Viachelsav LIASHENKO, and Aleksy KWILINSKI. 2021. “SYSTEMIC APPROACH TO DETERMINING THE SAFETY OF SUSTAINABLE DEVELOPMENT OF AIR TRANSPORT: INDICATORS, LEVEL, THREATS”. Journal of European Economy 20 (1):146-82. https://doi.org/10.35774/jee2021.01.146.