http://ukandeu.ac.uk/an-utterly-pernicious-bill/
http://www.iata.org/whatwedo/Documents/economics/impact_of_brexit.pdf
http://ukandeu.ac.uk/cancelling-brexit-what-would-happen-if-we-changed-our-mind-about-leaving-the-eu/
https://publications.parliament.uk/pa/ld201719/ldselect/ldeucom/15/15.pdf