1. Anderson C.2009. “The Smithsonian's Long Tail.” Keynote lecture at “Smithsonian 2.0: A Gathering to Re‐imagine the Smithsonian in the Digital Age” conference January 24.
2. Aron J.2012. “App Uses Earth's Magnetic Field to Guide You Indoors.”New Scientist July 9. Accessed August 27 2014.http://www.newscientist.com/blogs/onepercent/2012/07/earths‐magnetic‐field‐guides‐y.html.