@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/