%0 Journal Article %A N. I. Vulpe %T A polynomial basis for the centro-affine concomitants of a differential system %J Doklady Akademii Nauk %D 1980 %P 1033-1037 %V 250 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1980_250_5_a0/ %G ru %F DAN_1980_250_5_a0