http://www.cer.eu/sites/default/files/pb_ireland_brexit_6.7.17.pdf
https://committees.parliament.uk/oralevidence/2766/pdf/
https://www.regjeringen.no/globalassets/upload/kilde/fkd/red/2004/0009/ddd/pdfv/228920-nilf_rapport_2004_9_s.pdf
https://www.publications.parliament.uk/pa/cm201617/cmselect/cmwomeq/799/799.pdf