@inproceedings{igor2011moduli,
title={MODULI SPACES OF NONNEGATIVE SECTIONAL CURVATURE AND NON-UNIQUE SOULS},
author={Igor Belegradek, Slawomir Kwasik, and Reinhard Schultz},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160913205631280748895},
booktitle={Journal of Differential Geometry},
volume={89},
number={1},
pages={49-85},
year={2011},
}
Igor Belegradek, Slawomir Kwasik, and Reinhard Schultz. MODULI SPACES OF NONNEGATIVE SECTIONAL CURVATURE AND NON-UNIQUE SOULS. 2011. Vol. 89. In Journal of Differential Geometry. pp.49-85. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160913205631280748895.