The Boyertown Institute of Science. Bikeway, 1999. Retrieved
April 2, 2003 from World Wide Web:
< http://www.members.aol.com/datasam/BIS/page1.htm>
Kyle Heenk, The Physics of Cycling, 1998. Retrieved
April 2, 2003 from World Wide Web:
<http://www.kent.k12.wa.us/staff/trobinso/physicspages/PhysOf1998A/Cycling-Heenk/forces.html>
The Physics of Bicycling, Date Unknown. Retrieved March
28, 2003 from World
Wide Web:
< http://www.physicsofbicycling.homestead.com/index.html >
Rolling Resistance, Date Unknown. Retrieved March 28,
2003 from World
Wide Web:
< http://www.softride.com/rollingresistance.html >