%0 Journal Article
%T Meetings of the St.~Petersburg Mathematical Society
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 2002
%P 175-181
%V 57
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_2002_57_1_a16/
%G en
%F RM_2002_57_1_a16