كرة ألكسندر القرنية: الفرق بين النسختين

* {{ماثوورلد|urlname=AlexandersHornedSphere|title=Alexander's Horned Sphere}}

* Zbigniew Fiedorowicz. Math 655 – Introduction to Topology. [http://www.math.ohio-state.edu/~fiedorow/math655/] – Lecture notes

* [http://www.ultrafractal.com/showcase/jos/alexanders-horn.html rotating animation]

* [http://pouet.net/prod.php?which=30253 PC OpenGL demo rendering and expanding the cusp]