https://www.lobbycontrol.de/2020/09/lobbyregister-entwurf-im-internationalen-vergleich/?pk_campaign=20201008&pk_source=nl
https://www.lobbycontrol.de/2021/03/klare-kante-gesetze-verschaerfen/?pk_campaign=20210311&pk_source=nl
https://www.cidrap.umn.edu/sites/default/files/public/downloads/cidrap-covid19-viewpoint-part1.pdf