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/
https://carnegie.ru/commentary/85414
https://jamestown.org/program/russias-military-boosts-electromagnetic-spectrum-capability/
https://snob.ru/profile/400176/blog/1001472