
https://www.nzz.ch/international/radikales-regime-wie-sich-der-kreml-unter-wladimir-putin-radikalisierte-ld.1755674?reduced=true

http://www.progressives-zentrum.org/wp-content/uploads/2018/10/Les-Oubliés-Entretiens-sur-les-terres-où-prospère-le-vote-extrême_Das-Progressive-Zentrum_Johannes-Hillje.pdf

https://www.opendemocracy.net/can-europe-make-it/adam-chmielewski/unsympathetic-people-and-overwhelming-success-of-polands-exclusi?utm_source=Daily+Newsletter&utm_campaign=9038c5d758-DAILY_NEWSLETTER_MAILCHIMP&utm_medium=email&utm_term=0_717bc5d86d-9038c5d758-407405485