@article{ZNSL_1998_255_a11,
     author = {O. L. Semenova},
     title = {A property of purely hyperbolic {Fuchsian} groups of the second kind},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {177--183},
     publisher = {mathdoc},
     volume = {255},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1998_255_a11/}
}