%0 Journal Article
%A I. A. Shishmarev
%T On asymptotic behavior as $t\to0$ and $T$-product for hypoelliptic systems
%J Doklady Akademii Nauk
%D 1976
%P 1018-1020
%V 226
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1976_226_5_a7/
%G ru
%F DAN_1976_226_5_a7