http://ukandeu.ac.uk/brexit-a-french-perspective/
https://blogs.lse.ac.uk/brexit/2021/01/11/article-16-of-the-ireland-northern-ireland-protocol-offers-no-quick-fix/
http://www.cesifo-group.de/ifoHome/publications/working-papers/CESifoWP/CESifoWPdetails?wp_num=6448&CESifoWP.search=+
https://rusi.org/sites/default/files/newsbrief_37.3_elliott.pdf