TY  - JOUR
AU  - V. Ya. Ivrii
TI  - Conditions for the correctness in Gevrey classes of the Cauchy problem for nonstrictly hyperbolic operators
JO  - Doklady Akademii Nauk
PY  - 1975
SP  - 775
EP  - 777
VL  - 221
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1975_221_4_a5/
LA  - ru
ID  - DAN_1975_221_4_a5
ER  -