%0 Journal Article
%T Meetings of Leningrad Mathematical Society
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1991
%V 46
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1991_46_2_a17/
%G ru
%F RM_1991_46_2_a17