http://ukandeu.ac.uk/an-utterly-pernicious-bill/
http://www.resolutionfoundation.org/app/uploads/2017/10/Changing-Lanes-3.pdf
https://ec.europa.eu/commission/sites/beta-political/files/joint_report.pdf
https://www.parliament.uk/documents/lords-committees/eu-select/Third-Interparliamentary-Forum-on-Brexit-statement.pdf