TY  - JOUR
AU  - I. A. Shishmarev
TI  - On the Cauchy problem and $T$-products for hypoelliptic systems
JO  - Izvestiya. Mathematics 
PY  - 1983
SP  - 577
EP  - 609
VL  - 20
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1983_20_3_a7/
LA  - en
ID  - IM2_1983_20_3_a7
ER  -