
http://news.sky.com/story/theresa-may-theres-no-economic-case-for-breaking-up-the-uk-10787816

https://publications.parliament.uk/pa/ld201719/ldselect/ldeucom/129/129.pdf

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