https://carnegie.ru/commentary/86502
https://foreignpolicy.com/2022/02/18/russia-ukraine-arrest-assassination-invasion/
http://region.expert/inside-out/
https://www.bbc.com/russian/features-60289770
https://www.bbc.com/russian/news-60149695
https://fakeoff.org/history/neudobnaya-pravda-o-moskovskikh-samozvantsakh-prozvannykh-tsaryami