https://jamestown.org/program/the-realities-of-russian-military-shipbuilding-part-one/
https://www.rbc.ru/newspaper/2021/10/04/61571a279a79478e0bc0b011
https://carnegie.ru/commentary/85414
http://www.kasparov.ru/material.php?id=614CB672DC70D
https://jamestown.org/program/russias-military-boosts-electromagnetic-spectrum-capability/
https://snob.ru/profile/400176/blog/1001472
http://region.expert/1regionalist/