@article{DAN_1978_243_6_a5,
     author = {A. B. Venkov and A. I. Vinogradov},
     title = {The asymptotic distribution of the norms of hyperbolic classes and spectral characteristics of cusp forms of weight zero for a {Fuchsian} group},
     journal = {Doklady Akademii Nauk},
     pages = {1373--1376},
     publisher = {mathdoc},
     volume = {243},
     number = {6},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_243_6_a5/}
}