%0 Journal Article %T Meetings of the Moscow Mathematical Society %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2002 %P 619-626 %V 57 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_2002_57_3_a21/ %G en %F RM_2002_57_3_a21