TY  - JOUR
AU  - V. Ya. Ivrii
TI  - Cauchy problem for nonstrictly hyperbolic equations
JO  - Doklady Akademii Nauk
PY  - 1972
SP  - 1032
EP  - 1034
VL  - 207
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1972_207_5_a2/
LA  - ru
ID  - DAN_1972_207_5_a2
ER  -