https://www.rbc.ru/newspaper/2021/10/27/6177cdaf9a7947130abd9129
https://jamestown.org/program/russias-cossacks-strategic-asset-or-financial-liability/
https://carnegie.ru/commentary/85483
http://region.expert/landscape/
https://www.rosbalt.ru/world/2021/09/22/1922421.html