http://www.libdems.org.uk/brexit-challenge-justice#
https://curia.europa.eu/jcms/upload/docs/application/pdf/2018-12/cp180187en.pdf
https://www.opendemocracy.net/en/can-europe-make-it/rest-and-west-thoughts-on-brexit-and-migration-part-one/
http://www.oxera.com/Latest-Thinking/Publications/Reports/2017/Brexit-ports.aspx