https://www.gov.uk/government/publications/information-about-the-withdrawal-bill
https://www.spiegel.de/politik/ausland/brexit-deutscher-ex-botschafter-warnt-vor-zu-selbstgefaelligem-blick-auf-grossbritannien-a-0e50fbd5-de82-4b1a-b7cc-eef28f56577c
https://www.socialeurope.eu/2017/07/road-soft-brexit/
http://blogs.lse.ac.uk/brexit/2018/07/09/british-influence-in-brussels-had-been-far-greater-than-recognised/