https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1714en.pdf
https://www.socialeurope.eu/the-worlds-of-work-in-transition-managing-the-megatrends-impacting-labour-markets-and-society
https://docs.iza.org/dp16728.pdf
https://www.government.nl/documents/speeches/2018/09/24/speech-by-the-minister-of-foreign-affairs-stef-blok-to-kick-off-a-lunchtime-session-on-%E2%80%98action-against-human-trafficking-sanctions-accountability-and-the-rule-of-law%E2%80%99