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[2] “Maglev Monorails of the World - Shanghai, China,” The Monorail Society, http://www.monorails.org/tmspages/MagShang.html

[3] David Halliday, Robert Resnick and Kennieth S. Krane, Physics

[4] “Magnetism and Earnshaw’s Theorem,” MathPages,http://http://www.mathpages.com/home/kmath240/kmath240.htm

[5] Wikipedia, s.v. “Earnshaw’s Theorem,” http://en.wikipedia.org/wiki/Earnshaw%27s_Theorem

[6] Engineering Concepts. Explanation of Magnet Ratings. November, 2005. http://www.engconcepts.net/Magnet_Ratings.htm

[7] Friend, Paul. Functional Description. November, 2003. http://cegt201.bradley.edu/projects/proj2004/maglevt1/FUN CT%20DISC.pdf

[8] Post, Richard F., “Magnetic Levitation for Moving Objects,” U.S. Patent No.5,722,326