https://www.bruegel.org/sites/default/files/2022-11/WP%2018.pdf
https://www.tandfonline.com/doi/epdf/10.1080/10220461.2023.2226108?needAccess=true
https://www.institute.global/insights/geopolitics-and-security/windsor-framework-what-has-been-agreed-and-what-it-means-northern-ireland-protocol
https://trade.ec.europa.eu/doclib/docs/2021/february/tradoc_159438.pdf