https://www.svoboda.org/a/putin-priznal-rossiya-strana-bednosti/31506698.html
https://lansinginstitute.org/2021/10/12/russian-intelligence-focus-in-bulgaria/
https://www.svoboda.org/a/posle-hruscheva-i-gorbacheva-zhdatj-li-rossii-reformatora/31500658.html
https://www.rosbalt.ru/blogs/2021/10/07/1924690.html
https://jamestown.org/program/the-realities-of-russian-military-shipbuilding-part-one/
https://www.rbc.ru/newspaper/2021/10/04/61571a279a79478e0bc0b011
https://www.kp.ru/daily/28335.5/4480309/