
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/741926/Final_EEA_report.PDF

http://www.guengl.eu/news/article/gue-ngl-news/adoption-of-the-european-travel-information-and-authorisation-system-a-hidd

http://letter_to_department_for_exiting_the_european_union_to_publish_the_findings_of_the_analysis_it_has_carried_out_of_the_impact_of_different_brexit_outcomes_for_the_uk_economy