https://hvylya.net/analytics/243252-virtualnyy-sammit-putina-baydena-analiz-osnovnyh-itogov
https://www.rosbalt.ru/russia/2021/12/10/1935140.html
https://carnegie.ru/commentary/85935
https://www.nytimes.com/2021/12/05/world/europe/putin-russia-ukraine-troops.html