https://www.atlanticcouncil.org/blogs/iransource/is-iran-going-on-an-arms-shopping-spree-in-moscow/
https://www.ng.ru/world/2021-11-09/1_8296_usa.html
https://day.kyiv.ua/uk/article/den-planety/nebezpechna-vis
https://www.washingtonpost.com/world/interactive/2021/us-russia-sanctions/
https://jamestown.org/program/the-realities-of-russian-military-shipbuilding-part-one/
https://www.rbc.ru/newspaper/2021/10/04/61571a279a79478e0bc0b011