https://www.cesifo-group.de/DocDL/ifoDD_18-01_03-09_Ochsner.pdf
https://researchbriefings.files.parliament.uk/documents/CBP-7212/CBP-7212.pdf
http://blogs.lse.ac.uk/brexit/2017/09/05/warning-the-cost-of-brexit-could-seriously-damage-your-health-service/
https://blogs.lse.ac.uk/brexit/2021/04/13/the-totality-of-uk-irish-relations/