
https://verfassungsblog.de/demokratie-in-der-supra-eu/

https://blogs.lse.ac.uk/europpblog/2023/10/17/why-differentiation-is-now-at-the-heart-of-europes-political-system/

https://ukandeu.ac.uk/wp-content/uploads/2023/09/UKICE-Full-Fact-Policy-Landscape-2023.pdf