https://onlinelibrary.wiley.com/doi/epdf/10.1111/jcms.13411
https://uk.news.yahoo.com/what-happens-next-northern-ireland-deal-075103266.html
https://www.socialeurope.eu/wp-content/uploads/2019/09/Occ-Pap-14.pdf
https://www.documentcloud.org/documents/5955249-Report.html