%0 Journal Article %A P. G. Zograf %T Puchsian groups and small eigenvalues of the Laplace operator %J Zapiski Nauchnykh Seminarov POMI %D 1982 %P 24-29 %V 122 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1982_122_a3/ %G ru %F ZNSL_1982_122_a3