
https://files.taxfoundation.org/20221013150933/International-Tax-Competitiveness-Index-2022.pdf

https://www.brookings.edu/wp-content/uploads/2018/04/es_20180416_digitalcurrencies.pdf

https://www.corriere.it/politica/22_novembre_18/di-maio-nuova-vita-sara-inviato-speciale-ue-golfo-persico-trattare-prezzo-petrolio-gas-0805b148-6720-11ed-b05a-06c1012dfe21.shtml