https://www.newarab.com/investigations/syrian-airline-haftars-army-profit-human-smuggling
http://odlisnost.cz/posts/pristehovalci-a-nase-zamestnani
http://www.cesifo-group.de/ifoHome/publications/working-papers/CESifoWP/CESifoWPdetails?wp_num=6460&CESifoWP.search=+
http://blogs.lse.ac.uk/brexit/2017/06/05/uk-voters-including-leavers-care-more-about-reducing-non-eu-than-eu-migration/