https://www.rosbalt.ru/world/2021/12/30/1937990.html
http://region.expert/defederalization/
https://hvylya.net/analytics/244375-ultimatum-putina-i-rossiysko-ukrainskaya-voyna-2022
https://www.bbc.com/russian/features-59817247
https://www.bbc.com/russian/news-59815965
https://www.rbc.ru/newspaper/2021/12/29/619f93a29a79479fd98185b7
https://rg.ru/2021/12/28/kakimi-mogut-byt-glavnye-tendencii-2022-goda.html