TY  - JOUR
AU  - Pierre H. Bérard
TI  - On the Wave Equation on a Compact Riemannian Manifold withour Conjugate Points.
JO  - Mathematische Zeitschrift
PY  - 1977
SP  - 249
EP  - 276
VL  - 155
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1977__155_172561/
ID  - MZ_1977__155_172561
ER  -