https://ec.europa.eu/social/main.jsp?catId=738&langId=en&pubId=8553
https://www.researchgate.net/publication/351524462_HesaMag_23_-_with_a_special_report_about_workers_in_the_food_chain/link/609bfc9b458515a04c638ff6/download
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef22040en.pdf
http://ec.europa.eu/epsc/sites/epsc/files/epsc_europe_is_back_trends_jan.pdf