TY  - JOUR
AU  - Nishitani, Tatsuo
TI  - On The Cauchy Problem for Non Effectively Hyperbolic Operators, The Ivrii-Petkov-Hörmander Condition and the Gevrey Well Posedness
JO  - Serdica Mathematical Journal
PY  - 2008
SP  - 155
EP  - 178
VL  - 34
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SMJ2_2008_34_1_a6/
LA  - en
ID  - SMJ2_2008_34_1_a6
ER  -