https://socialeurope.eu/brexit-why-does-northern-ireland-matter-so-much
https://economicgraph.linkedin.com/resources/linkedin-workforce-report-uk-april-2018
https://www.instituteforgovernment.org.uk/sites/default/files/publications/IfG_Brexit_dispute_resolution_WEB.pdf
http://www.voxeurop.eu/en/2017/eu-uk-relations-5120821