%0 Journal Article
%A V. I. Bliznikas
%T The geometry of systems of first order partial differential equations
%J Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara
%D 1969
%P 33-53
%V 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/INTG_1969_2_a1/
%G ru
%F INTG_1969_2_a1