%0 Journal Article %A Yu. I. Lyubich %T Almost periodic functions in the spectral analysis of operators %J Doklady Akademii Nauk %D 1960 %P 518-520 %V 132 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1960_132_3_a7/ %G ru %F DAN_1960_132_3_a7