@article{01186260,
title = {A fundamental domain for the modular group of Riemann surfaces of type },
journal = {Annales Academiae Scientiarum Fennicae. Mathematica},
volume = {23},
year = {1998},
zbl = {0910.30034},
language = {en},
url = {http://dml.mathdoc.fr/item/01186260}
}
Chen, Min. A fundamental domain for the modular group of Riemann surfaces of type . Annales Academiae Scientiarum Fennicae. Mathematica, Tome 23 (1998) . http://gdmltest.u-ga.fr/item/01186260/