
http://www.ips-journal.eu/regions/europe/article/show/a-banking-union-without-unity-2181/

https://www.europarl.europa.eu/doceo/document/A-9-2023-0155_EN.html

https://theconversation.com/bulgaria-is-joining-the-euro-in-january-and-not-everyone-is-pleased-258626