@misc{RM_1967_22_4_a6,
     title = {Meetings of the {Leningrad} {Mathematical} {Society}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {22},
     number = {4},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1967_22_4_a6/}
}