@article{01631354,
title = {Some examples of discrete groups and hyperbolic orbifolds of infinite volume.},
journal = {Journal of Lie Theory},
volume = {11},
year = {2001},
pages = {491-503},
zbl = {0980.20039},
language = {en},
url = {http://dml.mathdoc.fr/item/01631354}
}
Klimenko, Elena. Some examples of discrete groups and hyperbolic orbifolds of infinite volume.. Journal of Lie Theory, Tome 11 (2001) pp. 491-503. http://gdmltest.u-ga.fr/item/01631354/