Cuadrilátero de Saccheri (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Cuadrilátero de Saccheri" in Spanish language version.

refsWebsite

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1books.google.com

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books.google.com

Boris Abramovich Rozenfelʹd (1988). A History of Non-Euclidean Geometry: Evolution of the Concept of a Geometric Space (Abe Shenitzer translation edición). Springer. p. 65. ISBN 0-387-96458-4.