http://norden.diva-portal.org/smash/get/diva2:1095959/FULLTEXT02.pdf
https://www.crfb.org/blogs/whats-latest-build-back-better-framework
http://www.ips-journal.eu/regions/europe/article/show/a-banking-union-without-unity-2181/
https://www.nber.org/system/files/working_papers/w28598/w28598.pdf