%0 Journal Article
%T Meetings of the Moscow Mathematical Society
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1968
%V 23
%N 2
%U http://geodesic.mathdoc.fr/item/RM_1968_23_2_a10/
%G ru
%F RM_1968_23_2_a10