https://www.socialeurope.eu/2017/07/49234/
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/866744/CCS0120013106-001_The_UKs_Points-Based_Immigration_System_WEB_ACCESSIBLE.pdf
https://theconversation.com/fact-check-does-immigration-have-an-impact-on-wages-or-employment-83666
https://www.ips-journal.eu/interviews/theres-a-broad-consensus-in-denmark-around-migration-7635/