%0 Journal Article
%T Meetings of the Moscow Mathematical Society
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1989
%V 44
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1989_44_6_a9/
%G ru
%F RM_1989_44_6_a9