%0 Journal Article %A V. A. Pliss %T Structural stability of a periodic system of differential equations %J Differencialʹnye uravneniâ %D 1991 %P 2077-2081 %V 27 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1991_27_12_a7/ %G ru %F DE_1991_27_12_a7