http://fedtrust.co.uk/our-work-on-europe/hard-brexit-international-trade-and-the-wto-scenario/
http://fedtrust.co.uk/brexit-a-meaningful-vote-for-mps-implies-a-meaningful-vote-for-the-people/
https://voxeu.org/system/files/epublication/Economics%20of%20Brexit.pdf
https://www.iwh-halle.de/fileadmin/user_upload/publications/iwh_discussion_papers/iwh-discussion-paper_2019-04_Brautzsch_Holtemoeller.pdf