
https://www.ips-journal.eu/topics/foreign-and-security-policy/lessons-we-can-teach-7439/

https://trybunal.gov.pl/en/hearings/judgments/art/11662-ocena-zgodnosci-z-konstytucja-rp-wybranych-przepisow-traktatu-o-unii-europejskiej

http://www.lisbon-treaty.org/wcm/the-lisbon-treaty/treaty-on-european-union-and-comments/title-1-common-provisions/7-article-7.html