
http://www.cer.org.uk/sites/default/files/insight_js_st_9.6.17.pdf

https://www.iwh-halle.de/fileadmin/user_upload/publications/iwh_discussion_papers/iwh-discussion-paper_2019-04_Brautzsch_Holtemoeller.pdf

https://www.instituteforgovernment.org.uk/sites/default/files/publications/voting-on-brexit-report-final.pdf