https://www.baua.de/DE/Angebote/Publikationen/Berichte/F2398.pdf?__blob=publicationFile&v=3
http://www.euronews.com/2017/09/28/posted-workers-facing-harsh-realities?utm_source=newsletter&utm_medium=en&utm_content=posted-workers-facing-harsh-realities&_ope=eyJndWlkIjoiZjU3Y2JhYmUwMGUxZDFiNTUxOTU1ZDljNzExNTI1MmEifQ==
https://www.socialeurope.eu/structural-reforms-labour-markets-impair-innovation
http://www.britishchambers.org.uk/press-office/press-releases/bcc-firms-invest-in-local-labour-but-still-need-foreign-skills-to-plug-shortages.html
http://www.britishchambers.org.uk/Workforce%20Survey%202017%20-%20Skills%20shortages.pdf
https://theconversation.com/fact-check-does-immigration-have-an-impact-on-wages-or-employment-83666
http://www.russellgroup.ac.uk/media/5521/rg-international-students-june-2017.pdf
http://berlinpolicyjournal.com/the-bottom-forty-percent-have-not-benefited/
http://odlisnost.cz/posts/pristehovalci-a-nase-zamestnani