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References

  1. A. Beardon,The Geometry of Discrete Groups, Springer-Verlag, 1983.

  2. Hilbert andCohn-Vossen,Geometry and the Imagination, Chelsea Publishing Company, 1950.

  3. W. Thurston,The Geometry and Topology of Three-Manifolds, Princeton University Lecture Notes, 1978.

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Schwartz, R. Pappus’s theorem and the modular group. Publications Mathématiques de l’Institut des Hautes Études Scientifiques 78, 187–206 (1993). https://doi.org/10.1007/BF02712918

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  • DOI: https://doi.org/10.1007/BF02712918

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