%0 Journal Article %A H. Żołądek %T Invariant subspaces of an additive cluster operator %J Doklady Akademii Nauk %D 1986 %P 41-44 %V 287 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1986_287_1_a8/ %G ru %F DAN_1986_287_1_a8