http://www.voxeurop.eu/en/2017/eu-uk-relations-5120821
https://blogs.lse.ac.uk/brexit/2021/01/11/article-16-of-the-ireland-northern-ireland-protocol-offers-no-quick-fix/
https://publications.parliament.uk/pa/cm201719/cmselect/cmpubacc/401/401.pdf
https://infacts.org/fight-brexit-including-changing-mind/