https://publications.parliament.uk/pa/bills/cbill/58-03/0204/220204.pdf
https://blogs.lse.ac.uk/brexit/2021/05/17/brexit-is-a-political-ponzi-scheme/
https://institute.global/sites/default/files/articles/Fixing-the-Northern-Ireland-Protocol-A-Way-Forward.pdf
http://bruegel.org/wp-content/uploads/2017/03/WP_2017_03-.pdf