%0 Journal Article %A L. A. Lyusternik %T Topological foundations of the general theory of eigenvalues %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1970 %V 25 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1970_25_4_a8/ %G ru %F RM_1970_25_4_a8