%0 Journal Article %A L. N. Nikol'skaya %T Geometrical properties of classes of characteristic vectors and point spectra of linear operators %J Funkcionalʹnyj analiz i ego priloženiâ %D 1970 %P 105-106 %V 4 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1970_4_3_a14/ %G ru %F FAA_1970_4_3_a14