https://www.brookings.edu/blog/techtank/2020/07/31/big-tech-and-antitrust-pay-attention-to-the-math-behind-the-curtain/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=92428572&utm_source=hs_email
https://ec.europa.eu/growth/tools-databases/dem/monitor/sites/default/files/DTM_Industrie%204.0.pdf
https://www.lobbycontrol.de/lobbyismus-und-klima/pipelines-in-die-politik-neue-studie-ueber-die-macht-der-gaslobby-106772/