http://www.kasparov.ru/material.php?id=617938231B0A0§ion_id=43452FA6D4743
https://tyzhden.ua/%D0%A1%D0%B2%D1%96%D1%82/253450
https://www.nytimes.com/2021/10/25/us/politics/russia-cybersurveillance-biden.html
https://www.ng.ru/economics/2021-10-24/1_8285_balance.html
https://www.svoboda.org/a/putin-priznal-rossiya-strana-bednosti/31506698.html
https://lansinginstitute.org/2021/10/12/russian-intelligence-focus-in-bulgaria/