Tukia P, Wang X. Discreteness of subgroups of $\mathrm{SL}(2,\boldsymbol{C})$ containing elliptic elements. Math. Scand. [Internet]. 2002 Dec. 1 [cited 2024 Apr. 27];91(2):214-20. Available from: https://www.mscand.dk/article/view/14386