https://www.socialeurope.eu/unions-responses-to-the-covid-19-crisis-in-europe
https://www.socialeurope.eu/2017/06/world-imbalances-decline-wages/
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef18037en.pdf
http://foodresearch.org.uk/wp-content/uploads/2016/07/Agricultural-labour-briefing-FINAL-4-July-2016.pdf