%0 Journal Article %A D. È. Allakhverdiev %T Nonselfadjoint operators which depend rationally on the spectral parameter %J Doklady Akademii Nauk %D 1969 %P 743-746 %V 186 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1969_186_4_a0/ %G ru %F DAN_1969_186_4_a0