@article{MOMA_1997__124_4_178796,
     author = {Chang-Yu Xia},
     title = {A {Sphere} {Theorem} for {Submanifolds} in a {Manifold} with {Pinched} {Positive} {Curvature.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {365--368},
     publisher = {mathdoc},
     volume = {124},
     number = {4},
     year = {1997},
     zbl = {0905.53039},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1997__124_4_178796/}
}