https://ia802703.us.archive.org/14/items/displacementofpo031323mbp/displacementofpo031323mbp.pdf

http://www.unhcr.org/cgi-bin/texis/vtx/home/opendocPDFViewer.html?docid=556725e69&query=world%20at%20war%202015

http://www.unhcr.org/pages/49c3646c14.html

https://www.aeaweb.org/aea/2016conference/program/preliminary.php?search_string=60+Million+Refugees&search_type=session&association=&jel_class=&search =Search#search_box

https://www.google.de/#q=REFUGEES%2C+ASYLUM+SEEKERS+AND+POLICY+IN+OECD+COUNTRIES

http://www.migrationpolicycentre.eu/