TY  - JOUR
AU  - Gregório Pacelli Bessa
TI  - Differentiable sphere theorems for Ricci curvature.
JO  - Mathematische Zeitschrift
PY  - 1993
SP  - 245
EP  - 260
VL  - 214
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1993__214_1_174566/
ID  - MZ_1993__214_1_174566
ER  -