%0 Journal Article
%T Meetings of the St. Petersburg Mathematical Society
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 2008
%P 397-403
%V 63
%N 2
%U http://geodesic.mathdoc.fr/item/RM_2008_63_2_a19/
%G en
%F RM_2008_63_2_a19