https://jamestown.org/program/clashes-intensify-between-moscow-and-circassians-on-key-issues/
https://carnegie.ru/commentary/85400
https://www.svoboda.org/a/kak-krasnaya-armiya-vzryvala-kiev/31467844.html
https://analytics.hvylya.net/237377-istoricheskie-oshibki-vladimira-putina