
http://www.cbi.org.uk/cbi-prod/assets/File/June%202017_CBI%20economic%20forecast%20table(1).pdf

https://www.greatbritishpolitics.co.uk/europe/654-dual-nationality-and-the-hurdles-facing-britons-who-want-to-keep-eu-citizenship-after-brexit.html

https://www.ifo.de/DocDL/EEAG-2019-executive-summary.pdf