https://www.ips-journal.eu/interviews/theres-a-broad-consensus-in-denmark-around-migration-7635/
http://www.cesifo-group.de/ifoHome/publications/working-papers/CESifoWP/CESifoWPdetails?wp_num=6452&CESifoWP.search=+
http://www.euronews.com/2018/07/09/europe-s-immigration-crisis-still-lacks-permanent-solution-does-european-ncna889636
http://www.ecreu.com/pdfs/alternative-white-paper-presented-by-UK-%20citizens-in-europe.pdf