https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/fomeef18001en.pdf
https://apnews.com/article/prison-to-plate-inmate-labor-investigation-c6f0eb4747963283316e494eadf08c4e
https://www.economiesuisse.ch/de/print/pdf/node/48305