%0 Journal Article %A D. L. Berman %T Solution of an extremal problem in operator theory and analogues of an identity of M.~Riesz %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1982 %P 201-202 %V 37 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1982_37_2_a6/ %G en %F RM_1982_37_2_a6