"Chuck Hoberman: Unfolding Structures Inventor." Invention at Play: Lemelson Center for the Study of Invention and Innovation. (2007-). http://www.inventionatplay.org/inventors_hob.html (11 August 2009).

"Chuck Hoberman: Unfolding Structures Inventor." Invention at Play: Lemelson Center for the Study of Invention and Innovation. (2007-). http://www.inventionatplay.org/inventors_hob.html (11 August 2009).