
https://ec.europa.eu/commission/sites/beta-political/files/citizens-rights-essential-principles-draft-position-paper_en.pdf

https://www.publications.parliament.uk/pa/ld201617/ldselect/ldeucom/116/116.pdf

http://uk.businessinsider.com/former-eu-negotiator-mays-government-has-handled-brexit-in-the-absolute-worst-way-2017-7