TY  - JOUR
AU  - V. M. Petkov
TI  - The Cauchy problem for symmetrizable systems and for non-strictly hyperbolic equations
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1971
VL  - 26
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1971_26_6_a12/
LA  - ru
ID  - RM_1971_26_6_a12
ER  -