
https://www.piie.com/blogs/realtime-economics/if-markets-are-right-about-long-real-rates-public-debt-ratios-will

https://www.ecb.europa.eu/pub/pdf/other/ecb.escblegalconferenceproceedings201812.en.pdf

https://www.socialeurope.eu/euro-enlargement-convergence-definancialization