Astroide: diferència entre les revisions

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== Referències ==
* {{ref-llibre|autor = J. Dennis Lawrence |títol = A catalog of special plane curves |editorial = Dover Publications |any = 1972 |isbn = 0-486-60288-5 |pàgines = 4–5,34–35,173–174 }}
* {{ref-llibre|autor = Wells D |any = 1991 |títol = The Penguin Dictionary of Curious and Interesting Geometry |editorial = Penguin Books |lloc = Nova York|isbn = 0-14-011813-6 |pàgines = 10–11}}
 
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* [http://www.2dcurves.com/roulette/roulettea.html Article a 2dcurves.com]
* [http://xahlee.org/SpecialPlaneCurves_dir/Astroid_dir/astroid.html Visual Dictionary Of Special Plane Curves, Xah Lee].
* [http://www.bama.ua.edu/~tmewes/Java/Astroid/StonerAstroid.shtml Stoner-Wohlfarth astroid applet (physics)] {{Webarchive|url=https://web.archive.org/web/20060922184809/http://bama.ua.edu/~tmewes/Java/Astroid/StonerAstroid.shtml |date=2006-09-22 }}.
* [http://demonstrations.wolfram.com/BarsOfAnAstroid/ Bars of an Astroid] per Sándor Kabai.