@article{GDZPPN002490382,
title = {A Sphere Theorem for Submanifolds in a Manifold with Pinched Positive Curvature.},
journal = {Monatshefte f\"ur Mathematik},
volume = {123},
year = {1997},
pages = {365-368},
zbl = {0905.53039},
url = {http://dml.mathdoc.fr/item/GDZPPN002490382}
}
Xia, Chang-Yu. A Sphere Theorem for Submanifolds in a Manifold with Pinched Positive Curvature.. Monatshefte für Mathematik, Tome 123 (1997) pp. 365-368. http://gdmltest.u-ga.fr/item/GDZPPN002490382/