
https://institute.global/sites/default/files/articles/Moving-On-How-the-British-Public-Views-Brexit-and-What-It-Wants-From-the-Future-Relationship-With-the-European-Union.pdf

https://www.hks.harvard.edu/sites/default/files/centers/mrcbg/programs/senior.fellows/Brexit%20Paper%20IV%20-%20Final%20Paper.pdf

https://www.regjeringen.no/globalassets/upload/kilde/fkd/red/2004/0009/ddd/pdfv/228920-nilf_rapport_2004_9_s.pdf