
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/648148/September_-_Joint_technical_note_on_the_comparison_of_EU-UK_positions_on_citizens__rights.pdf

http://www.oxera.com/Latest-Thinking/Publications/Reports/2017/Brexit-ports.aspx

https://www.opendemocracy.net/can-europe-make-it/kieran-oberman/does-catalonia-have-right-to-secede?utm_source=Daily+Newsletter&utm_campaign=9960ef2d4f-DAILY_NEWSLETTER_MAILCHIMP&utm_medium=email&utm_term=0_717bc5d86d-9960ef2d4f-407405485