http://www.coggs.polis.cam.ac.uk/news/forum-on-geopolitics-triple-bill-on-brexit
https://curia.europa.eu/jcms/upload/docs/application/pdf/2018-12/cp180187en.pdf
https://share.trin.cam.ac.uk/sites/public/Comms/Rogers_brexit_as_revolution.pdf
http://www.migrationobservatory.ox.ac.uk/resources/reports/unsettled-status-which-eu-citizens-are-at-risk-of-failing-to-secure-their-rights-after-brexit/