http://e2.tam.uiuc.edu/TAM370/Mathematica/LorenzAttractor/LorenzAttractor.html
http://www.is.ocha.ac.jp:8080/~ichiro/satoh/java-lorenz.html
http://141.142.3.130/SCMS/DigLib/text/chaos/Chaos.html
http://math.gmu.edu/~jtopp/project4.html
http://amath.colorado.edu/appm/faculty/jdm/faq.html
http://www.nepenthes.com/Misc/chaos.html