"Oligarchy and democracy operate within a single system, and American politics is a daily display of their interplay": Jeffrey A. Winters, Oligarchy and Democracy, in The American Interest, vol. 7, n. 2, November–December 2011 [28 September 2011]. URL consultato il 17 agosto 2012.
theatlantic.com
"The reemergence of an American financial oligarchy is quite recent": Simon Johnson, The Quiet Coup, in The Atlantic, May 2009. URL consultato il 17 agosto 2012.
The fabulous riches of Putin's inner circle, su thebureauinvestigates.com, The Bureau Investigates. URL consultato il 7 giugno 2012 (archiviato dall'url originale il 28 giugno 2012).