%0 Journal Article %A S. G. Gindikin %A V. F. Molchanov %A Yu. G. Reshetnyak %A I. I. Shitikov %T XII~School on Operator Theory in Functional Spaces %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1988 %V 43 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1988_43_1_a28/ %G ru %F RM_1988_43_1_a28