
https://www.lobbycontrol.de/wp-content/uploads/LobbyControl-Jahresbericht-2023-24.pdf

https://ecipe.org/wp-content/uploads/2024/02/ECI_OccasionalPaper_02-2024_LY02.pdf

https://www.openmarketsinstitute.org/publications/sling-de-economizing-antitrust-law-starts-with-market-definition