https://www.brookings.edu/opinions/the-democratic-threat-to-democracy/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=200305858&utm_source=hs_email
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://economiesuisse.ch/de/artikel/im-gesundheitswesen-findet-eine-regulierungs-und-keine-kostenexplosion-statt