https://foreignpolicy.com/2021/12/13/biden-putin-ukraine-deter-russia-or-accept-defeat/
https://www.rosbalt.ru/russia/2021/12/10/1935140.html
https://nvo.ng.ru/wars/2021-12-09/1_1169_aggression.html
https://carnegie.ru/commentary/85947
https://www.rbc.ru/newspaper/2021/12/08/61af0c3e9a7947ae2c8b653a
https://lb.ua/world/2021/12/08/500454_radyanskiy_soyuz_znishchili_rosiyani.html