
https://ec.europa.eu/commission/commissioners/2014-2019/andriukaitis/blog/likening-eu-ussr-not-unreasonable_en

https://centreonconstitutionalchange.ac.uk/sites/default/files/2021-04/Union%20at%20the%20Crossroads.pdf

https://enlargement.ec.europa.eu/document/download/17115494-8122-4d10-8a06-2cf275eecde7_en?filename=ukraine-report-2025.pdf