http://www.ips-journal.eu/topics/human-rights/article/show/lets-not-lose-our-thread-2155/
https://openmigration.org/en/op-ed/how-immigrants-are-saving-the-italian-economy-and-pensions/
http://blogs.lse.ac.uk/brexit/2018/05/15/switzerland-wanted-more-immigration-controls-but-economic-self-interest-will-probably-prevail/