https://verfassungsblog.de/with-exclusive-competence-comes-great-responsibility/
https://ec.europa.eu/info/sites/info/files/opinion-comite-adhoc-2016-10-26_en.pdf
https://www.lobbycontrol.de/lobbyismus-in-der-eu/nach-katargate-fortschritte-und-blockaden-bei-neuen-regeln-fuer-eu-abgeordnete-111593/
https://dc.claremont.org/content/uploads/2022/09/Provocations-4-Holloway-Final.pdf