TY  - JOUR
AU  - A. V. Deryabina
TI  - Second-order hyperbolic equations with strong characteristic degeneracy at the initial hypersurface
JO  - Sbornik. Mathematics
PY  - 2000
SP  - 503
EP  - 527
VL  - 191
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2000_191_4_a1/
LA  - en
ID  - SM_2000_191_4_a1
ER  -