@article{IM_1981__65_142848,
     author = {Peter Li and Jia Qing Zhong},
     title = {Pinching {Theorem} for the {First} {Eigenvalue} on {Positively} {Curved} {Manifolds.}},
     journal = {Inventiones mathematicae},
     pages = {221--226},
     publisher = {mathdoc},
     volume = {65},
     year = {1981},
     zbl = {0496.53031},
     url = {http://geodesic.mathdoc.fr/item/IM_1981__65_142848/}
}