@article{GDZPPN002442027, title = {Differentiable sphere theorems for Ricci curvature.}, journal = {Mathematische Zeitschrift}, volume = {212}, year = {1993}, pages = {245-260}, zbl = {0844.53028}, url = {http://dml.mathdoc.fr/item/GDZPPN002442027} }
Pacelli Bessa, Gregório. Differentiable sphere theorems for Ricci curvature.. Mathematische Zeitschrift, Tome 212 (1993) pp. 245-260. http://gdmltest.u-ga.fr/item/GDZPPN002442027/