https://www.bbc.com/russian/features-59652453
https://foreignpolicy.com/2021/12/13/biden-putin-ukraine-deter-russia-or-accept-defeat/
https://nvo.ng.ru/wars/2021-12-09/1_1169_aggression.html
https://www.levada.ru/2021/12/09/elektoralnye-rejtingi-partij-i-prezidenta/
https://carnegie.ru/commentary/85947
https://lb.ua/world/2021/12/08/500454_radyanskiy_soyuz_znishchili_rosiyani.html
https://theins.ru/history/246932