https://www.rbc.ru/newspaper/2021/12/06/61aa3c879a7947e608b37485
https://www.bbc.com/russian/news-59491511
https://lansinginstitute.org/2021/12/01/russia-breaks-europes-border-from-within/
https://www.rosbalt.ru/blogs/2021/11/30/1933460.html
https://www.ng.ru/economics/2021-11-23/1_8308_conflict.html