%0 Journal Article %A S. G. Gindikin %A V. M. Klimkin %A S. Ya. Novikov %A Yu. G. Reshetnyak %T XIII School on Operator Theory in Functional Spaces %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1989 %V 44 %N 3 %U http://geodesic.mathdoc.fr/item/RM_1989_44_3_a32/ %G ru %F RM_1989_44_3_a32