https://www.gov.uk/government/publications/information-about-the-withdrawal-bill
https://www.brookings.edu/blog/order-from-chaos/2018/01/05/the-brexit-options-explained/?utm_campaign=Brookings%20Brief&utm_source=hs_email&utm_medium=email&utm_content=59815275
https://www.socialeurope.eu/wp-content/uploads/2019/01/03_Brexit_Kroeger.pdf
https://onlinelibrary.wiley.com/doi/epdf/10.1111/jcms.13386