%0 Journal Article %A A. G. Rutkas %T On the theory of characteristic functions of linear operators %J Doklady Akademii Nauk %D 1976 %P 546-549 %V 229 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1976_229_3_a5/ %G ru %F DAN_1976_229_3_a5