https://www.ng.ru/education/2021-12-08/8_8321_children.html
https://ru.krymr.com/a/portnikov-rossia-rodnoy-yazyk-vyvesky-metro-moskva-fadeyev/31599430.html
https://carnegie.ru/commentary/85935
https://www.nytimes.com/2021/12/05/world/europe/putin-russia-ukraine-troops.html
https://www.kommersant.ru/doc/5100564