%0 Journal Article %A A. G. Sigalov %T A new algorithm in the theory of perturbations of the continuous spectrum %J Doklady Akademii Nauk %D 1964 %P 49-52 %V 158 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_158_1_a10/ %G ru %F DAN_1964_158_1_a10