Cuadrángulo completo (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Cuadrángulo completo" in Spanish language version.

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Hartshorne, 1967;Coxeter, 1987, p. 15. Hartshorne, Robin (1967). Foundations of Projective Geometry. W. A. Benjamin. pp. 53–6. Coxeter, H. S. M. (1987). Projective Geometry, 2nd ed. Springer-Verlag. ISBN 0-387-96532-7.