https://www.regjeringen.no/globalassets/upload/kilde/fkd/red/2004/0009/ddd/pdfv/228920-nilf_rapport_2004_9_s.pdf
http://www.geog.qmul.ac.uk/media/geography/docs/research/working-beyond-the-border/Governing-Labour-Standards.pdf
https://ormosi.wordpress.com/2017/06/06/brexit-uncertainty-fewer-mergers-big-business-winners/#more-566