TY  - JOUR
AU  - Mitsuru Sugimoto
TI  - A priori estimates for higher order hyperbolic equations.
JO  - Mathematische Zeitschrift
PY  - 1994
SP  - 519
EP  - 532
VL  - 215
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1994__215_1_174626/
ID  - MZ_1994__215_1_174626
ER  -