https://ecipe.org/wp-content/uploads/2019/03/ECI_19_OccasionalPaper_Competition_01_2019-1.pdf
https://www.politico.eu/article/eu-ombudsman-emily-oreilly-calls-for-ethics-rules-revamp-qatar-lobbying-scandal-erupts-eva-kaili-european-parliament/
https://www.cer.eu/sites/default/files/pbrief_corruption_27.4.21.pdf
https://www.lobbying.ie/media/6072/regulation-of-lobbying-annual-report-2016-final-web.pdf