
https://wiiw.ac.at/different-choices-divergent-paths-poland-and-ukraine-dlp-6419.pdf

https://ecfr.eu/wp-content/uploads/Ambiguous-alliance-Neutrality-opt-outs-and-European-defence.pdf

https://www.ifri.org/fr/publications/briefings-de-lifri/un-changement-depoque-vers-une-reorientation-de-politique-etrangere