%0 Journal Article %A P. S. Knopov %T On weak convergence of measures generated by iterative procedures in a Hilbert space %J Doklady Akademii Nauk %D 1981 %P 29-32 %V 256 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_256_1_a5/ %G ru %F DAN_1981_256_1_a5