%0 Journal Article %A V. M. Millionshchikov %T A metric theory of linear systems of differential equations %J Doklady Akademii Nauk %D 1968 %P 20-23 %V 179 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1968_179_1_a3/ %G ru %F DAN_1968_179_1_a3