https://www.socialeurope.eu/israel-palestine-a-comparative-perspective
http://www.bertelsmann-stiftung.de/fileadmin/files/Projekte/Migration_fair_gestalten/IB_PolicyBrief_Einwanderungsgesetz_082017_ENG.pdf
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/695321/An_inspection_of_exit_checks.pdf
https://reliefweb.int/attachments/66a09358-2cf3-448c-846a-d29f9f8f768c/62a9d1494.pdf