
https://blogs.lse.ac.uk/europpblog/2022/10/06/the-european-political-community-a-step-toward-differentiated-integration-in-europe/

https://www.ipg-journal.de/regionen/europa/artikel/detail/national-oekologisches-patchwork-3976/

https://www.ips-journal.eu/topics/democracy-and-society/rien-ne-va-plus-1-7748/