@inproceedings{yan-huirigidity,
title={Rigidity of manifolds with Bakry–Emery Ricci curvature bounded below},
author={Yan-Hui Su, and Hui-Chun Zhang},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20190816233229200713409},
booktitle={Geom Dedicata},
volume={160},
pages={321-331},
}

Yan-Hui Su, and Hui-Chun Zhang. Rigidity of manifolds with Bakry–Emery Ricci curvature bounded below. Vol. 160. In Geom Dedicata. pp.321-331. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20190816233229200713409.