http://dailycaller.com/2017/09/11/national-debt-tops-20-trillion-for-the-first-time-in-history
https://ugebrev.dk/flashnews/finans-flashnews/oecd-chef-flere-finansielle-faresignaler-2007
http://www.zerohedge.com/news/2017-01-04/global-debt-hits-325-world-gdp-rises-record-217-trillion
https://www.cnbc.com/2016/10/06/global-debt-balloons-to-all-time-high-of-152-trillion-imf-warns.html