
http://www.express.co.uk/news/uk/840143/DNA-English-villages-foreigners-residents-study

https://www.lameduse.ch/2018/05/25/la-meduse-a-lu-affaire-gurtel-des-verdicts-qui-ebranlent-lespagne/

https://www.lobbycontrol.de/wp-content/uploads/LobbyControl-Jahresbericht_2022-2023.pdf