%0 Journal Article %A N. I. Vulpe %T Construction of a polynomial basis of comitants of a differential system %J Differencialʹnye uravneniâ %D 1979 %P 1399-1410 %V 15 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1979_15_8_a4/ %G ru %F DE_1979_15_8_a4