https://bellacaledonia.org.uk/2021/09/24/the-flemish-the-outliers-of-europes-independence-movements/
https://blogs.lse.ac.uk/europpblog/2024/08/12/why-the-eu-has-started-to-act-against-democratic-backsliding-and-why-it-may-even-stay-the-course/
http://www.diw.de/documents/publikationen/73/diw_01.c.562050.de/17-29.pdf
https://ec.europa.eu/info/sites/info/files/opinion-comite-adhoc-2016-10-26_en.pdf