
https://bdi.eu/media/user_upload/20171005_Pressemitteilung_Brexit.pdf

https://www.instituteforgovernment.org.uk/sites/default/files/publications/IfG_views-eu-27-v5_WEB.pdf

http://2ihmoy1d3v7630ar9h2rsglp-wpengine.netdna-ssl.com/wp-content/uploads/2019/09/190926-Brexit-and-the-Belfast-Good-Friday-Agreement-Final-report.pdf