
https://ukandeu.ac.uk/explainers/the-protocol-on-ireland-northern-ireland/?mc_cid=2bd4dc8e93&mc_eid=815b1928ec

http://www.conservativegroupforeurope.org.uk/wordpress/wp-content/uploads/2017/09/Keeping-the-bridges-open-a-CGE-Policy-Options-Paper-.pdf

https://www.etui.org/sites/default/files/2023-12/Relocation-an%20old%20problem%20in%20search%20of%20new%20answers_2023%20%281%29.pdf