@article{JLT_2001_11_2_JLT_2001_11_2_a12,
     author = {E. Klimenko },
     title = {Some {Examples} of {Discrete} {Groups} and {Hyperbolic} {Orbifolds} of {Infinite} {Volume}},
     journal = {Journal of Lie theory},
     pages = {491--503},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {2001},
     url = {http://geodesic.mathdoc.fr/item/JLT_2001_11_2_JLT_2001_11_2_a12/}
}