https://www.opendemocracy.net/en/beyond-trafficking-and-slavery/exploitation-rule-not-exception/
https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/fs-2020-na91-niveau-territoire-juin.pdf
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.euronews.com/2017/11/16/italian-doctor-laments-libyan-concentration-camps-for-migrants