https://www.ips-journal.eu/topics/foreign-and-security-policy/a-barbed-wire-curtain-around-europe-6602/?utm_campaign=en_1084_20230327&utm_medium=email&utm_source=newsletter
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/866744/CCS0120013106-001_The_UKs_Points-Based_Immigration_System_WEB_ACCESSIBLE.pdf
http://www.guengl.eu/news/article/gue-ngl-news/adoption-of-the-european-travel-information-and-authorisation-system-a-hidd