MATVIYENKO, Volodymyr; YEROMENKO, Viktoriya. THE GAS TRANSPORTATION SYSTEM OF UKRAINE IN CONDITIONS OF EXTERNAL THREAT TO ENERGY SECURITY STATE . Ekonomichna ta Sotsialna Geografiya, Kyiv, Ukraine, v. 69, p. 159–164, 2014. Disponível em: https://www.bulletin-esgeograph.org.ua/esg/article/view/69-matviyenko-et-al-159-164. Acesso em: 15 jul. 2026.