TY  - JOUR
AU  - V. Ya. Ivrii
TI  - The Cauchy problem for nonstrictly hyperbolic equations with smooth roots
JO  - Doklady Akademii Nauk
PY  - 1972
SP  - 1303
EP  - 1304
VL  - 204
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1972_204_6_a5/
LA  - ru
ID  - DAN_1972_204_6_a5
ER  -