https://www.inopressa.ru/article/20Dec2019/lemonde/gas.html
https://www.radiosvoboda.org/a/30336395.html
https://www.radiosvoboda.org/a/30335681.html
https://www.radiosvoboda.org/a/news-naftogaz-tranzyt-kontrakt/30332731.html
https://ru.krymr.com/a/chvk-vagnera-protiv-gvardii-sultana/30331998.html