TUKIA, P.; WANG, X. Discreteness of subgroups of $\mathrm{SL}(2,\boldsymbol{C})$ containing elliptic elements. MATHEMATICA SCANDINAVICA, [S. l.], v. 91, n. 2, p. 214–220, 2002. DOI: 10.7146/math.scand.a-14386. Disponível em: https://www.mscand.dk/article/view/14386. Acesso em: 28 mar. 2024.