https://economiesuisse.ch/de/artikel/oecd-mindeststeuer-es-gibt-keine-fairere-verteilung
http://www.globalbusinessoutlook.com/germanys-government-still-has-an-allergy-to-investing/
https://onlinelibrary.wiley.com/doi/10.1111/ecaf.12565
https://www.fraserinstitute.org/sites/default/files/economic-freedom-of-the-world-2021.pdf