https://www.ostro.org/donetsk/society/articles/554119/
https://www.kommersant.ru/doc/3726383
Fight clubs, neo-Nazi soccer hooligans, and motorcycle gangs serve as conduits for the Kremlin’s influence operations in Western countries.
https://www.theatlantic.com/amp/article/568741/
https://www.gazeta.ru/social/2018/08/05/11884273.shtml