http://voxeu.org/system/files/epublication/Brexit_Beckons_VoxEU.pdf
https://www.gov.uk/government/speeches/eu-speech-at-bloomberg
http://fedtrust.co.uk/a-chaotic-brexit-is-still-a-possibility/
https://www.opendemocracy.net/en/can-europe-make-it/rest-and-west-thoughts-on-brexit-and-migration-part-one/