
https://www.brookings.edu/articles/want-ukraine-in-the-eu-youll-have-to-reform-the-eu-too/

https://www.bruegel.org/sites/default/files/2024-03/PB%2005%202024_2.pdf

http://blogs.lse.ac.uk/brexit/2017/07/19/euroscepticism-has-taken-hold-across-the-eu-but-it-has-many-different-roots/