http://www.levyinstitute.org/pubs/wp_886.pdf
http://www.ips-journal.eu/topics/european-union/article/show/no-more-penny-pinching-2076/
https://www.socialeurope.eu/2017/07/european-safe-bond-handle-care/
https://theconversation.com/en-que-consiste-la-promesa-de-milei-de-dolarizar-argentina-218212