TY  - JOUR
AU  - Mitsuru Sugimoto
TI  - Estimates for hyperbolic equations with non-convex characteristics.
JO  - Mathematische Zeitschrift
PY  - 1996
SP  - 521
EP  - 532
VL  - 222
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1996__222_3_174899/
ID  - MZ_1996__222_3_174899
ER  -