%0 Journal Article %A V. A. Il'in %T On the properties of a reduced system of eigenfunctions and associated functions of a Keldys bundle of ordinary differential operators %J Doklady Akademii Nauk %D 1976 %P 30-33 %V 230 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1976_230_1_a5/ %G ru %F DAN_1976_230_1_a5