https://bdi.eu/media/user_upload/20171005_Pressemitteilung_Brexit.pdf
https://researchbriefings.files.parliament.uk/documents/CBP-7212/CBP-7212.pdf
https://www.gov.uk/government/news/programme-for-fourth-round-of-uk-eu-article-50-negotiations
http://www.euronews.com/2017/06/23/who-s-afraid-of-brexit?utm_source=newsletter&utm_medium=en&utm_content=who-s-afraid-of-brexit&_ope=eyJndWlkIjoiZjU3Y2JhYmUwMGUxZDFiNTUxOTU1ZDljNzExNTI1MmEifQ==