
https://static1.squarespace.com/static/58533f31bebafbe99c85dc9b/t/62bb1188ea129d15fd58abac/1656426896778/Electoral+Integrity+Global+Report+2019-2021+0.1.pdf

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

http://www.conservativehome.com/thecolumnists/2017/05/christopher-howarths-guide-to-brexit-the-manifesto-must-convince-leavers-and-lock-in-our-escape-from-the-eu.html