https://www.kommersant.ru/doc/5172697
https://rg.ru/2022/01/05/pochemu-padaiut-samolety-v-rossii-glavnye-prichiny.html
https://theins.ru/ekonomika/247567
http://region.expert/defederalization/
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.rbc.ru/newspaper/2021/12/28/61c21e289a79479e8562641b