JORGENSEN, T. On Cyclic Groups of Möbius Transformations. MATHEMATICA SCANDINAVICA, [S. l.], v. 33, p. 250–260, 1973. DOI: 10.7146/math.scand.a-11487. Disponível em: https://www.mscand.dk/article/view/11487. Acesso em: 23 jul. 2024.