
https://sp-bpr-en-prod-cdnep.azureedge.net/published/2018/2/2/Common-UK-Frameworks-after-Brexit/SB%2018-09.pdf

https://www.waz.de/politik/gabriel-brexit-vertrag-als-modell-fuer-eu-tuerkei-beziehung-id212938393.html

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/640485/Technical_note_on_Functionality_and_Protocol_7.pdf