https://www.economiesuisse.ch/de/artikel/globale-umverteilung-der-firmensteuern-mit-fragezeichen
https://uk.finance.yahoo.com/news/britain-public-finances-worse-gambia-153245680.html
https://ec.europa.eu/info/sites/info/files/economy-finance/ip127_en.pdf
https://ukandeu.ac.uk/what-sunaks-tax-return-tells-us-about-the-uk-tax-system/