%0 Journal Article %A I. Ts. Gokhberg %T Factorization of operator functions %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1963 %V 18 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1963_18_2_a13/ %G ru %F RM_1963_18_2_a13