%0 Journal Article %A F. G. Maksudov %A È. È. Pashaeva %T On multiple expansion in eigenfunctions, taking account of spectral singularities %J Doklady Akademii Nauk %D 1981 %P 287-289 %V 259 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_259_2_a6/ %G ru %F DAN_1981_259_2_a6