
https://www.economiesuisse.ch/de/artikel/kluge-steuerpolitik-bringt-wohlstand

https://www.propublica.org/article/how-private-nonprofits-ultrawealthy-tax-deductions-museums-foundation-art

https://www.cer.eu/sites/default/files/pbrief_LS_turkish_elections_29.3.23.pdf