https://ec.europa.eu/transparency/documents-register/detail?ref=C(2022)6536&lang=en
http://ecipe.org//app/uploads/2018/02/ECIPE_Occasional0218_HLM_V7.pdf
https://www.brookings.edu/blog/up-front/2019/04/09/how-big-is-the-problem-of-tax-evasion/?utm_campaign=Brookings%20Brief&utm_source=hs_email&utm_medium=email&utm_content=71720872
https://www.etui.org/sites/default/files/2020-09/Counting%20gigs_2020_web.pdf