%0 Journal Article %A A. V. Rybkin %T Functional calculus for contractions with an absolutely continuous %J Doklady Akademii Nauk %D 1992 %P 417-420 %V 326 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1992_326_3_a5/ %G ru %F DAN_1992_326_3_a5