http://www.oecd.org/els/soc/Risks-That-Matter-2018-Main-Findings.pdf
https://strengtheningeurope.eu/fileadmin/files/BSt/Publikationen/GrauePublikationen/EZ_JDI_BST_Mapping_Paper_How_are_you_doing_Europe_2019_ENG.pdf
https://www.lobbycontrol.de/wp-content/uploads/LobbyControl-Jahresbericht_2022-2023.pdf
https://www.intergencommission.org/wp-content/uploads/2018/05/IC-inheritance-tax.pdf