https://www.fr.de/politik/eine-neue-stufe-der-repression-in-russland-91112923.html
https://novayagazeta.ru/articles/2021/11/13/chekisty-nachinaiut-s-chistogo-lista
https://novayagazeta.ru/articles/2021/11/12/chugun-rzhaveet
https://newtimes.ru/articles/detail/205386
https://jamestown.org/program/russias-cossacks-strategic-asset-or-financial-liability/