BEARDON, A. F.; JORGENSEN, T. Fundamental domains for finitely generated Kleinian groups. MATHEMATICA SCANDINAVICA, [S. l.], v. 36, p. 21–26, 1975. DOI: 10.7146/math.scand.a-11559. Disponível em: https://www.mscand.dk/article/view/11559. Acesso em: 29 apr. 2024.