%0 Journal Article %T Meetings of the Moscow Mathematical Society %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2004 %P 985-990 %V 59 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_2004_59_5_a18/ %G en %F RM_2004_59_5_a18