WEBGRAFIA

A Visual Dictionary of Special Plane Curves

http://xahlee.org/SpecialPlaneCurves_dir/specialPlaneCurves.html

Courbes 2D

http://mathcurve.com/courbes2d/courbes2d.shtml

Mathematical curves

http://www.2dcurves.com/

Famous Curves Index

http://www.gap-system.org/~history/Curves/Curves.html

Wikipedia

http://it.wikipedia.org/wiki/Pagina_principale

Wolfram Mathworld

http://mathworld.wolfram.com/