உடுவுரு (Tamil Wikipedia)

Analysis of information sources in references of the Wikipedia article "உடுவுரு" in Tamil language version.

refsWebsite

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1books.google.com

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archive.org

Loria, Gino (1902). Spezielle algebraische und transscendente ebene kurven. Theorie und Geschichte. Leipzig. pp. 224.{{cite book}}: CS1 maint: location missing publisher (link)

books.google.com

J. J. v. Littrow (1838). "§99. Die Astrois". Kurze Anleitung zur gesammten Mathematik. Wien. p. 299.

doi.org

dx.doi.org

Nishimura, Takashi; Sakemi, Yu (2011). "View from inside". Hokkaido Mathematical Journal 40 (3): 361–373. doi:10.14492/hokmj/1319595861.

xahlee.info

A derivation of this equation is given on p. 3 of http://xahlee.info/SpecialPlaneCurves_dir/Astroid_dir/astroid.pdf