@article{GDZPPN002097540,
title = {Pinching Theorem for the First Eigenvalue on Positively Curved Manifolds.},
journal = {Inventiones mathematicae},
volume = {64},
year = {1981},
pages = {221-226},
zbl = {0496.53031},
url = {http://dml.mathdoc.fr/item/GDZPPN002097540}
}
Li, Peter; Zhong, Jia Qing. Pinching Theorem for the First Eigenvalue on Positively Curved Manifolds.. Inventiones mathematicae, Tome 64 (1981) pp. 221-226. http://gdmltest.u-ga.fr/item/GDZPPN002097540/