http://publications.iom.int/system/files/pdf/wmr_2018_en.pdf
http://www.radiofree.org/us/why-diemuk-shouldnt-take-a-precise-position-on-the-brexit-negotiations-or-why-britain-is-screwed/
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/741926/Final_EEA_report.PDF
https://www.epp.eu/files/uploads/2017/04/11-EPP-Resolution-1-2.pdf