http://www.cer.eu/sites/default/files/pb_ireland_brexit_6.7.17.pdf
https://publications.parliament.uk/pa/bills/cbill/2019-2020/0007/20007.pdf
https://www.theatlantic.com/international/archive/2020/09/britain-brexit-humbling/616343/
https://www.socialeurope.eu/brexit-status-quo-ex-ante