http://ec.europa.eu/budget/mff/hlgor/library/reports-communication/hlgor-report_20170104.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
https://frc.org.uk/news/january-2018-(1)/investigation-into-the-audit-of-the-financial-stat
https://www.brookings.edu/opinions/the-approaching-debt-wave/?utm_campaign=Brookings%20Brief&utm_source=hs_email&utm_medium=email&utm_content=82830565