Círculo ortocentroidal (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Círculo ortocentroidal" in Spanish language version.

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doi.org

Guinand, Andrew P. (1984), «Euler lines, tritangent centers, and their triangles», American Mathematical Monthly 91 (5): 290-300, JSTOR 2322671, doi:10.2307/2322671 ..

Guinand, Andrew P. (1984), «Euler lines, tritangent centers, and their triangles», American Mathematical Monthly 91 (5): 290-300, JSTOR 2322671, doi:10.2307/2322671 ..
Leversha, Gerry; Smith, G. C. (November 2007), «Euler and triangle geometry», Mathematical Gazette 91 (522): 436-452, JSTOR 40378417 ..