Jones, Gareth A.. "Noncongruence subgroups of the Hecke groups G (...).." Journal für die reine und angewandte Mathematik 314 (1980): 174-176. <http://eudml.org/doc/152216>.
@article{Jones1980, author = {Jones, Gareth A.}, journal = {Journal für die reine und angewandte Mathematik}, keywords = {noncongruence subgroups; Hecke groups; maps on surfaces}, pages = {174-176}, title = {Noncongruence subgroups of the Hecke groups G (...).}, url = {http://eudml.org/doc/152216}, volume = {314}, year = {1980}, }
TY - JOUR AU - Jones, Gareth A. TI - Noncongruence subgroups of the Hecke groups G (...). JO - Journal für die reine und angewandte Mathematik PY - 1980 VL - 314 SP - 174 EP - 176 KW - noncongruence subgroups; Hecke groups; maps on surfaces UR - http://eudml.org/doc/152216 ER -