https://www.bbc.com/russian/news-58966676
https://www.kommersant.ru/doc/5152106
https://www.rbc.ru/newspaper/2021/12/15/61b73f979a794745391b5ac7
https://foreignpolicy.com/2021/12/13/biden-putin-ukraine-deter-russia-or-accept-defeat/
https://www.rosbalt.ru/russia/2021/12/10/1935140.html