%0 Journal Article %A F. S. Rofe-Beketov %A A. M. Khol'kin %T A fundamental system of solutions for an operator differential equation with a boundary condition at infinity %J Matematičeskie zametki %D 1984 %P 697-709 %V 36 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1984_36_5_a7/ %G ru %F MZM_1984_36_5_a7