%0 Journal Article %A G. A. Suvorchenkova %T Asymptotic behavior of the spectral function of a first order differential equation with an unbounded operator coefficient %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1976 %V 31 %N 2 %U http://geodesic.mathdoc.fr/item/RM_1976_31_2_a16/ %G ru %F RM_1976_31_2_a16