https://www.rbc.ru/newspaper/2021/12/22/61c1a9509a79476aa5e6b2cf
http://www.kasparov.ru/material.php?id=61C19701BA317
https://edition.cnn.com/2021/12/19/politics/joe-biden-russia-ukraine-obama-2014/index.html
http://www.kasparov.ru/material.php?id=61BCB3221DD2B
https://www.bbc.com/russian/news-59691037