@misc{RM_1968_23_1_a7,
     title = {On section {{\textquotedblleft}Communications} of the {Moscow} {Mathematical} {Society{\textquotedblright}}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1968},
     volume = {23},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1968_23_1_a7/}
}