Grupo del papel pintado (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Grupo del papel pintado" in Spanish language version.

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archive.org

doi.org

dx.doi.org

  • Pólya, George (November 1924). «Über die Analogie der Kristallsymmetrie in der Ebene» [On the analog of crystal symmetry in the plane]. Zeitschrift für Kristallographie (en alemán) 60: 278-282. doi:10.1524/zkri.1924.60.1.278. 

hathitrust.org

babel.hathitrust.org

  • E. Fedorov (1891) "Симметрія на плоскости" (Simmetrija na ploskosti, Symmetry in the plane), Записки Императорского С.-Петербургского минералогического общества (Zapiski Imperatorskogo Sant-Petersburgskogo Mineralogicheskogo Obshchestva, Proceedings of the Imperial St. Petersburg Mineralogical Society), series 2, 28: 345–390 (in Russian).