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 Copied and pasted from the end of Bumblebee, since some are too lazy to click a link: 
 # ^ John H. McMasters (March/April 1989). ""The flight of the bumblebee and related myths of entomological engineering"". American Scientist 77: 146–169.  cited in Jay Ingram (2001). The Barmaid's Brain. Aurum Press. pp. 91–92. ISBN 1854106333.  
 # ^ Jay Ingram (2001). The Barmaid's Brain. Aurum Press. pp. 91–92. ISBN 1854106333.  
 # ^ ""Bumblebees finally cleared for takeoff"". Cornell Chronicle. March 20, 2000. http://www.news.cornell.edu/releases/March00/APS_Wang.hrs.html. Retrieved January 26, 2008.  
 # ^ John Maynard Smith. ""Flight in Birds and Aeroplanes - Science Video"". http://www.vega.org.uk/video/programme/84. Retrieved June 20, 2010. 
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