%0 Journal Article %A V. B. Lidskii %T Theorems on the completeness of a system of characteristic and adjoined elements of operators having a discrete spectrum %J Doklady Akademii Nauk %D 1958 %P 1088-1091 %V 119 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1958_119_6_a7/ %G ru %F DAN_1958_119_6_a7