Tóth 2002, Section 1.2, Rotations and Möbius Transformations, p. 22. Tóth, Gábor (2002), Finite Möbius groups, minimal immersions of spheres, and moduli
Tóth 2002, Section 1.6, Additional Topic: Klein's Theory of the Icosahedron, p. 66. Tóth, Gábor (2002), Finite Möbius groups, minimal immersions of spheres, and moduli