http://ec.europa.eu/transport/sites/transport/files/pocketbook2016.pdf
https://www.socialeurope.eu/breaking-the-chains-subcontracting-in-the-eu
https://extranet.acer.europa.eu/Official_documents/Acts_of_the_Agency/Publication/ACER’s%20Final%20Assessment%20of%20the%20EU%20Wholesale%20Electricity%20Market%20Design.pdf
https://www.smmt.co.uk/wp-content/uploads/sites/2/SMMT-Sustainability-Report-2018.pdf