https://www.tandfonline.com/doi/pdf/10.1080/13501763.2022.2036791?needAccess=true
https://www.tuc.org.uk/sites/default/files/Brexit%20Legal%20Opinion.pdf
https://www.esri.ie/system/files/publications/WP677_0.pdf
https://www.esri.ie/system/files/publications/RS181_0.pdf