References

  1. ABAR, Celina A.P. O usodo GeoGebra na investigaçao da geometría elíptica. Actas del VI Congreso Uruguayo de Educación Matemática.
  2. COXETER, H.S.M. The Non-Euclidean Symmetry of Escher's Picture 'Circle Limit III'. Leonardo, Vol. 12, No. 1, pp. 19-25. Published by The MIT Press.
  3. COXETER, H.M.S. The trigonometry of hyperbolic tessellations.Canad. Math. Bull. 40(1997), 158-168. 1997.
  4. DUNHAM, Douglas. Some Maths behind the Circle Limit's Patterns. University of Minessotta.
  5. DUNHAM, Douglas. A Circle Limit III Calculation. University of Minessotta.
  6. GREENBERG, M. Euclidean and Non-Euclidean Geometry. Third edition. W.H. Freeman Inc. New York, 1993.
  7. RODRÍGUEZ TRÍAS, Ujué. Herramientas Hiperbólicas y Proyectivas con GeoGebra. TFM, Universidad de Cantabria.