Congruence subgroups of groups commensurable with $\text{PSL}(2,\mathbb{Z})$ of genus 0 and 1.

Cummins, C.J.. "Congruence subgroups of groups commensurable with of genus 0 and 1.." Experimental Mathematics 13.3 (2004): 361-382. <http://eudml.org/doc/52776>.

@article{Cummins2004,
author = {Cummins, C.J.},
journal = {Experimental Mathematics},
keywords = {modular group; congruence subgroups; genus},
language = {eng},
number = {3},
pages = {361-382},
publisher = {Taylor & Francis, Philadelphia},
title = {Congruence subgroups of groups commensurable with of genus 0 and 1.},
url = {http://eudml.org/doc/52776},
volume = {13},
year = {2004},
}

TY - JOUR
AU - Cummins, C.J.
TI - Congruence subgroups of groups commensurable with of genus 0 and 1.
JO - Experimental Mathematics
PY - 2004
PB - Taylor & Francis, Philadelphia
VL - 13
IS - 3
SP - 361
EP - 382
LA - eng
KW - modular group; congruence subgroups; genus
UR - http://eudml.org/doc/52776
ER -