https://www.socialeurope.eu/overcrowded-camps-at-europes-borders
https://theconversation.com/fact-check-does-immigration-have-an-impact-on-wages-or-employment-83666
http://library.fes.de/pdf-files/id/ipa/13354.pdf
http://www.euronews.com/2017/12/08/view-visegrad-nations-protect-the-eu-it-s-time-to-say-thanks-