https://www.ecb.europa.eu/press/key/date/2012/html/sp120726.en.html
https://open.overheid.nl/documenten/ronl-48b77cf7bdf0f91d4ed394ca2a37d2041bc50647/pdf
https://hodlfm.com/regulation/eu-wealth-registry/
https://www.piie.com/blogs/realtime-economics/if-markets-are-right-about-long-real-rates-public-debt-ratios-will