@article{GDZPPN002106817,
title = {A new version of differentiable sphere theorem.},
journal = {Inventiones mathematicae},
volume = {96},
year = {1989},
pages = {219-228},
zbl = {0688.53016},
url = {http://dml.mathdoc.fr/item/GDZPPN002106817}
}
Shiohama, K.; Otsu, Y.; Yamaguchi, T. A new version of differentiable sphere theorem.. Inventiones mathematicae, Tome 96 (1989) pp. 219-228. http://gdmltest.u-ga.fr/item/GDZPPN002106817/