https://publications.parliament.uk/pa/cm201719/cmselect/cmcumeds/365/365.pdf
https://www.socialeurope.eu/wp-content/uploads/2019/01/03_Brexit_Kroeger.pdf
https://onlinelibrary.wiley.com/doi/epdf/10.1111/jcms.13386
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/638958/Continuity_in_the_availability_of_goods_for_the_EU_and_the_UK_Position_Paper.pdf