
http://www.ips-journal.eu/topics/european-union/article/show/no-more-penny-pinching-2076/

https://ecfr.eu/wp-content/uploads/2024/02/Wars-and-elections-How-European-leaders-can-maintain-public-support-for-Ukraine.pdf

http://www.cesifo-group.de/portal/page/portal/DocBase_Service/studien/Studie-2017-Felbermayr-etal-Brexit-79843.pdf