
https://www.progressivepolicy.org/trade-fact-of-the-week-ilo-236-billion-in-worldwide-profits-from-forced-labor-three-quarters-of-it-from-forced-sex-work/

https://www.dgb-bestellservice.de/besys_dgb/pdf/DGB15130.pdf

https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1663en.pdf