https://jamestown.org/program/russias-cossacks-strategic-asset-or-financial-liability/
https://www.rbc.ru/newspaper/2021/07/28/61000ff29a7947b9d5a98363
https://www.rbc.ru/newspaper/2021/07/26/60faa84e9a7947c072b8caa3
https://www.rbc.ru/newspaper/2021/07/20/60f5888f9a794798c0a11a79