https://hvylya.net/analytics/244375-ultimatum-putina-i-rossiysko-ukrainskaya-voyna-2022
https://www.rosbalt.ru/russia/2021/12/29/1937757.html
https://theins.ru/opinions/pavel-chikov/247514
https://www.bbc.com/russian/features-59817247
https://www.bbc.com/russian/news-59815965
https://www.rbc.ru/newspaper/2021/12/29/619f93a29a79479fd98185b7
https://www.kommersant.ru/doc/5153396
https://www.rosbalt.ru/moscow/2021/12/24/1937067.html