Pendulum
http://brain.cc.kogakuin.ac.jp/~kanamaru/Chaos/e/DP/
http://math.la.asu.edu/~kawski/MATLAB/matlab.htm
http://online.redwoods.cc.ca.us/instruct/darnold/DEProj/sp08/jaltic/index.htm
http://www.math.harvard.edu/archive/118r_spring_05/
http://tabitha.phas.ubc.ca/wiki/index.php/Double_pendulum
http://www.physics.usyd.edu.au/~wheat/sdpend/dynamics1.html
http://sonenvir.at/data/doublependulum/
http://brain.cc.kogakuin.ac.jp/~kanamaru/Chaos/e/PendulumMovie/2-Double.html
Local file 1 MelnikovMethod Lyapunov DoublePendulum articles
http://adsabs.harvard.edu/abs/1984spcb.book...86R
http://u.math.biu.ac.il/~schiff/Teaching/956/
http://en.wikipedia.org/wiki/Double_pendulum
http://www.cns.gatech.edu/ChaosBook/
http://www.myphysicslab.com/dbl_pendulum.html
http://physlab.net/dbl_pendulum.html
http://www.maths.tcd.ie/~plynch/SwingingSpring/doublependulum.html
http://www.maths.surrey.ac.uk/explore/michaelspages/Double.htm
http://www.phy.davidson.edu/StuHome/chgreene/Chaos/Double%20Pendulum/pendulum_content_frame.htm
http://www.youtube.com/watch?v=anwl6OZ1UuQ
T. Shinbrot, C. Grebogi, J. Wisdom, and J. A. Yorke, ‘‘Chaos in a double pendulum,’’ Am. J. Phys. 60, 491–499 1992
R. B. Levien and S. M. Tan, ‘‘Double pendulum: An experiment in chaos,’’
Am. J. Phys. 61, 1038–1044 1993