REFERENCES
- Cohen , J. ( 1981 ). On non-Hurwitz groups and non-congruence subgroups of the modular group . Glasgow Math. J. 22 : 1 – 7 .
- Marion , C. ( 2009 ). Triangle groups and PSL2(q) . J. Group Theory 12 : 689 – 708 .
- Marion , C. ( 2013 ). Random and deterministic triangle generation of three-dimensional classical groups I . Communications in Algebra 41 : 797 – 854 .
- Communicated by P. Tiep.