http://region.expert/defederalization/
https://www.rosbalt.ru/russia/2021/12/29/1937757.html
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.rosbalt.ru/blogs/2021/12/28/1937722.html