%0 Journal Article
%A M. I. Vishik
%A L. A. Lyusternik
%T Perturbation of eigenvalues and eigenelements for some non-selfadjoined operators
%J Doklady Akademii Nauk
%D 1960
%P 251-253
%V 130
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1960_130_2_a1/
%G ru
%F DAN_1960_130_2_a1