%0 Journal Article %A M. G. Okhrimenko %T Certain properties of homogeneous differential systems %J Differencialʹnye uravneniâ %D 1973 %P 2272-2275 %V 9 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1973_9_12_a26/ %G ru %F DE_1973_9_12_a26