@misc{RM_1991_46_2_a17,
     title = {Meetings of {Leningrad} {Mathematical} {Society}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {46},
     number = {2},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1991_46_2_a17/}
}