%0 Journal Article %A B. S. Jovanović %A P. P. Matus %T Coefficient Stability of Second-Order Operator-Differential Equations %J Differencialʹnye uravneniâ %D 2002 %P 1371-1377 %V 38 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2002_38_10_a9/ %G ru %F DE_2002_38_10_a9