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==Viungo vya Nje==
* [http://www.geocities.com/Area51/Quadrant/3864/sketchunifiedconstr.htm Ellipse & Hyperbola Construction] - An interactive sketch showing how to trace the curves of the ellipse and hyperbola. (Requires Java.)
* [http://web.archive.org/20071202082741/www.geocities.com/Area51/Quadrant/3864/sketchellipseconstr.htm Ellipse Construction] - Another interactive sketch, this time showing a different method of tracing the ellipse. (Requires Java.)
* [http://mathworld.wolfram.com/Ellipse.html Ellipse on MathWorld] - More on Ellipse
* [http://faculty.evansville.edu/ck6/ellipse.pdf The Shape and History of The Ellipse in Washington, D.C.] by Clark Kimberling
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