%0 Journal Article
%A Bryant, Robert L.
%A Griffiths, Phillip A.
%T Characteristic cohomology of differential systems. I. General theory
%J Journal of the American Mathematical Society
%D 1995
%P 507-596
%V 08
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1995-1311820-X/
%R 10.1090/S0894-0347-1995-1311820-X
%F 10_1090_S0894_0347_1995_1311820_X