@inproceedings{hui-chun2010ricci,
title={RICCI CURVATURE ON ALEXANDROV SPACES AND RIGIDITY THEOREM},
author={Hui-Chun Zhang, and Xi-Ping Zhu},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160910123214098274758},
booktitle={Comm. Anal. Geom.},
volume={18},
number={3},
pages={503–553},
year={2010},
}
Hui-Chun Zhang, and Xi-Ping Zhu. RICCI CURVATURE ON ALEXANDROV SPACES AND RIGIDITY THEOREM. 2010. Vol. 18. In Comm. Anal. Geom.. pp.503–553. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160910123214098274758.