%0 Journal Article %A N. A. Izobov %A S. N. Batan %T On the instability of characteristic exponents of linear differential systems under Perron perturbations %J Differencialʹnye uravneniâ %D 1996 %P 1341-1347 %V 32 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1996_32_10_a6/ %G ru %F DE_1996_32_10_a6