https://www.nytimes.com/2021/11/25/us/politics/biden-putin-russia-ukraine.html
https://www.finanz.ru/novosti/aktsii/kitay-sryvaet-gazovy-kontrakt-s-gazpromom-1029832846
https://www.inopressa.ru/article/30Sep2020/spiegel/schroeder.html