https://www.smmt.co.uk/wp-content/uploads/sites/2/SMMT-Sustainability-Report-2018.pdf
https://www.socialeurope.eu/europe-must-unite-to-stop-deep-sea-resource-grab
https://curia.europa.eu/jcms/upload/docs/application/pdf/2021-11/cp210197en.pdf
https://www.epsu.org/sites/default/files/article/files/EPSU%20Report%20Outsourcing%20state_EN.pdf