https://www.cdu.de/artikel/europa-richtig-machen-getting-europe-right
https://www.bruegel.org/sites/default/files/2024-03/PB%2005%202024_2.pdf
https://blogs.lse.ac.uk/europpblog/2023/09/15/what-unites-and-what-divides-poland/
http://visegradinsight.eu/app/uploads/2019/11/EaP-2030-Trends.pdf