https://publications.europa.eu/en/publication-detail/-/publication/506ecd7a-d51d-40cc-82f2-c8403ab57150
https://unctad.org/system/files/official-document/diaeiainf2021d1_en.pdf
https://ukandeu.ac.uk/wp-content/uploads/2020/10/UK-internal-Market-Bill-devolution-and-the-union.pdf