http://www.voxeurop.eu/en/2017/eu-uk-relations-5120821
http://voxeu.org/system/files/epublication/Brexit_Beckons_VoxEU.pdf
https://www.gov.uk/government/speeches/eu-speech-at-bloomberg
https://www.publications.parliament.uk/pa/cm201617/cmselect/cmintrade/817/817.pdf