@article{ZNSL_1982_122_a3,
     author = {P. G. Zograf},
     title = {Puchsian groups and small eigenvalues of the {Laplace} operator},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {24--29},
     publisher = {mathdoc},
     volume = {122},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1982_122_a3/}
}