http://www.cer.org.uk/sites/default/files/insight_JS_9.5.17.pdf
https://www.inquisitr.com/4784253/russian-media-interfered-in-the-uks-brexit-referendum-new-report-claims/
http://blogs.lse.ac.uk/brexit/2018/05/15/switzerland-wanted-more-immigration-controls-but-economic-self-interest-will-probably-prevail/