https://www.socialeurope.eu/economic-sovereignty-delusion
https://openeurope.org.uk/today/blog/what-would-a-no-deal-after-the-transition-period-look-like/
http://www.lawyersforbritain.org/eu-deal-financial-liabilities.shtml
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/677268/Letter_to_Business_Leaders__1_.pdf