https://www.rosbalt.ru/piter/2021/12/16/1936013.html
https://ru.krymr.com/a/portnikov-rossia-rodnoy-yazyk-vyvesky-metro-moskva-fadeyev/31599430.html
https://carnegie.ru/commentary/85479
https://jamestown.org/program/clashes-intensify-between-moscow-and-circassians-on-key-issues/