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12) A. C. Gross, C. R. Kyle, & D. J. Malewicki, "The Aerodynamics of Human-Powered Land Vehicles," Scientific American, December 1983, 142 - 152

13) M. Drela & J. Langford, "Human-powered Flight," Scientific American, November 1985,           144 - 151

14) D. E. H. Jones, "The Stability of the Bicycle," Physics Today, April 1970, 34 - 40

15) "The Future of Transportation," Scientifc American (Special Issue), October (1997)

16) "Materials, A Scientific American Book," Freeman (1967) 

17) Forrester, "Bicycle Transportation," MIT Press (1994), HE5736.F67.1994 

18) Tennekes, "The Simple Science of Flight," MIT Press (1997)