
https://www.europarl.europa.eu/at-your-service/files/be-heard/eurobarometer/2019/parlemeter-2019/executive-summary/en-parlemeter-2019-executive-summary.pdf

https://orsted.com/-/media/WWW/Docs/Corp/COM/Barometer-campaign/Green-Energy-Barometer-2017_with-appendix.ashx?la=en&hash=65C5D0F30494C277249CA7622AF0229AD5B6D3CB

https://www.stopcorrupt.lu/wp-content/uploads/2022/08/Corruption_ebs_523_report_en.pdf