%0 Journal Article %A G. N. Petrovskiǐ %T The approximability property of regular systems of linear differential equations %J Differencialʹnye uravneniâ %D 1976 %P 359-361 %V 12 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1976_12_2_a22/ %G ru %F DE_1976_12_2_a22