%0 Journal Article
%A L. V. Zilbergleit
%A V. V. Lychagin
%T Spencer cohomology of invariant systems of differential equations
%J Doklady Akademii Nauk
%D 1993
%P 544-546
%V 328
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1993_328_5_a3/
%G ru
%F DAN_1993_328_5_a3