https://www.iwh-halle.de/fileadmin/user_upload/publications/iwh_discussion_papers/iwh-discussion-paper_2019-04_Brautzsch_Holtemoeller.pdf
https://blogs.lse.ac.uk/brexit/2019/04/15/brexit-lessons-from-the-silesian-backstop-of-1919-25/
http://blogs.lse.ac.uk/brexit/2018/01/12/the-usual-underdogs-of-lobbying-were-the-surprising-winners-of-the-brexit-vote-debate/