https://files.taxfoundation.org/20221013150933/International-Tax-Competitiveness-Index-2022.pdf
https://www.veblen-institute.org/Editorial-Assumer-l-impot
https://www.bruegel.org/wp-content/uploads/2021/09/PC-2021-18-0909.pdf
https://www.ips-journal.eu/topics/european-integration/europe-needs-to-spend-its-money-better-7243/