%0 Journal Article %A A. F. Filippov %T Perturbations of linear systems with quasiperiodic coefficients %J Differencialʹnye uravneniâ %D 1990 %P 1343-1348 %V 26 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1990_26_8_a7/ %G ru %F DE_1990_26_8_a7