%0 Journal Article %A L. A. Sakhnovich %T Factorization problems and operator identities %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1986 %P 1-64 %V 41 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1986_41_1_a0/ %G en %F RM_1986_41_1_a0