https://images.transparencycdn.org/images/CPI-2023-Report.pdf
https://www.europarl.europa.eu/RegData/etudes/BRIE/2022/729299/EPRS_BRI(2022)729299_EN.pdf
https://www.instituteforgovernment.org.uk/sites/default/files/publications/IfG_Brexit_Euro_Court_Justice_WEB.pdf