https://www.publications.parliament.uk/pa/cm201617/cmselect/cmexeu/1125/1125.pdf
https://www.brookings.edu/wp-content/uploads/2020/10/Executive-order-worth-100-billion.pdf
https://www.brookings.edu/blog/brookings-now/2017/08/24/do-immigrants-steal-jobs-from-american-workers/?utm_campaign=Brookings%20Brief&utm_source=hs_email&utm_medium=email&utm_content=55726788
https://curia.europa.eu/jcms/upload/docs/application/pdf/2020-04/cp200040en.pdf