%0 Journal Article %A V. F. Kovalenko %A Yu. A. Semenov %T Some problems on expansion in generalized eigenfunctions of the %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1978 %P 119-157 %V 33 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1978_33_4_a2/ %G en %F RM_1978_33_4_a2