https://hvylya.net/analytics/244375-ultimatum-putina-i-rossiysko-ukrainskaya-voyna-2022
https://carnegie.ru/commentary/85998
https://www.rbc.ru/newspaper/2021/12/15/61b73f979a794745391b5ac7
http://www.kasparov.ru/material.php?id=61B49F42A54FD§ion_id=444F8A447242B
https://www.radiosvoboda.org/a/arestovych-putin-biden-viyna-donbas/31604580.html
https://hvylya.net/analytics/243252-virtualnyy-sammit-putina-baydena-analiz-osnovnyh-itogov