https://www.socialeurope.eu/reform-of-eu-fiscal-rules-more-ambition-needed
https://www.esri.ie/system/files/publications/SUSTAT123_2.pdf
https://theconversation.com/que-factores-explican-la-hiperinflacion-venezolana-216135
https://cepr.org/system/files/publication-files/190449-geneva_26_the_art_and_science_of_patience_relative_prices_and_inflation.pdf