TY  - JOUR
AU  - Shiu-Yuen Cheng
TI  - Eigenvalue Comparison Theorems and Its Geometric Applications.
JO  - Mathematische Zeitschrift
PY  - 1975
SP  - 289
EP  - 297
VL  - 143
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1975__143_172234/
ID  - MZ_1975__143_172234
ER  -