
https://bdi.eu/#/artikel/news/europa-muss-ein-worst-case-szenario-verhindern/

https://uk.reuters.com/article/uk-britain-eu-options/stairway-to-brexit-barnier-maps-out-uks-canadian-path-idUKKBN1ED23R

https://www.gov.uk/government/news/programme-for-fourth-round-of-uk-eu-article-50-negotiations