
https://ukandeu.ac.uk/long-read/the-protocol-post-brexit-northern-ireland/?mc_cid=9de7c359e6&mc_eid=815b1928ec

https://ukandeu.ac.uk/wp-content/uploads/2022/10/UKICE-Northern-Ireland-Protocol-Bill.pdf

http://bruegel.org/wp-content/uploads/2017/03/WP_2017_03-.pdf