%0 Journal Article %A È. Kadelburg %A M. Martinovič %T The spectral function of a second-order functional-differential operator %J Differencialʹnye uravneniâ %D 1989 %P 1882-1888 %V 25 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1989_25_11_a7/ %G ru %F DE_1989_25_11_a7