%0 Journal Article %A V. N. Gorbuzov %T Construction of differential systems from an infinitesimal operator and a universal invariant of a one-parameter group of transformations %J Differencialʹnye uravneniâ %D 1994 %P 899-901 %V 30 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1994_30_5_a19/ %G ru %F DE_1994_30_5_a19