Popular Mechanics USA — January 2010
Popular Mechanics USA — October 2008
Popular Mechanics USA — May 2005
Cell — 25 April 2013
Popular Mechanics USA — June 2009
Popular Mechanics USA — April 2005
Popular Mechanics USA — September 2008
Popular Mechanics USA — September 2010
Servo — September 2011
Popular Mechanics USA — June 2004
Popular Mechanics USA — January 2011
Zeit Wissen — Dezember-Januar 2013
Cell — 18 March 2013
Servo — March 2012
Servo — December 2012
Popular Mechanics USA — January 2006
Popular Mechanics USA — April 2010
Popular Mechanics USA — October 2005
Popular Mechanics USA — July 2011
Cell — 28 March 2013
Popular Mechanics USA — August 2007
Discover — April 2011
Popular Mechanics USA — December 2011
Cell — 11 April 2013
Popular Mechanics USA — December 2008
Popular Mechanics USA — October 2009
Discover — July-August 2012
Popular Mechanics USA — October 2011
Immunity — April 2013
Popular Mechanics USA — July 2007
Popular Mechanics USA — December 2006
Popular Mechanics USA — April 2012
Popular Mechanics USA — July 2010
Discover — September 2011
Servo — March 2011
Popular Mechanics USA — Home & DIY Guide 2010
Popular Mechanics USA — June 2011
Servo — January 2012
Discover — December 2012
Popular Mechanics USA — March 2010
