https://www.esri.ie/system/files/publications/QEC2019SPR_SA_Bergin.pdf
https://institute.global/sites/default/files/2020-07/Tony%20Blair%20Institute%2C%20A%20Path%20to%20Brexit%20Agreement%2C%20July%202020.pdf
https://docs.iza.org/dp16728.pdf
https://www.gov.uk/government/news/david-davis-concludes-visit-to-estonia