https://www.ips-journal.eu/topics/european-integration/europe-needs-to-spend-its-money-better-7243/
https://cdn.obr.uk/March-2020_EFO_presentation_slides.pdf
https://www.bancaditalia.it/compiti/riserve-portafoglio-rischi/cis/Presentazione_CIS_5.07.2021.pdf?language_id=1