https://www.rosbalt.ru/russia/2021/10/26/1927974.html
https://www.ng.ru/politics/2021-10-17/1_8279_kprf.html
https://www.rosbalt.ru/blogs/2021/10/14/1926168.html
https://jamestown.org/program/the-realities-of-russian-military-shipbuilding-part-one/
https://www.rbc.ru/newspaper/2021/10/04/61571a279a79478e0bc0b011
https://jamestown.org/program/russias-military-boosts-electromagnetic-spectrum-capability/