%0 Journal Article %A S. M. Shugrin %T Galilean systems of differential equations %J Differencialʹnye uravneniâ %D 1980 %P 2205-2218 %V 16 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1980_16_12_a11/ %G ru %F DE_1980_16_12_a11