%0 Journal Article
%A I. A. Shishmarev
%T On the Cauchy problem and $T$-products for hypoelliptic systems
%J Izvestiya. Mathematics 
%D 1983
%P 577-609
%V 20
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1983_20_3_a7/
%G en
%F IM2_1983_20_3_a7