https://openmigration.org/en/op-ed/how-immigrants-are-saving-the-italian-economy-and-pensions/
https://www.brookings.edu/blog/order-from-chaos/2018/07/31/its-time-for-the-united-states-and-europe-to-face-the-politics-of-cultural-displacement/?utm_campaign=Brookings%20Brief&utm_source=hs_email&utm_medium=email&utm_content=64909281
https://www.socialeurope.eu/refugees-how-could-we-possibly-get-here
https://www.publications.parliament.uk/pa/cm201617/cmselect/cmexeu/1125/1125.pdf