@inproceedings{zhongminsharp,
title={Sharp spectral gap and Li–Yau’s estimate on Alexandrov spaces},
author={Zhongmin Qian, Hui-Chun Zhang, and Xi-Ping Zhu},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160910122357767346757},
booktitle={Math. Z},
volume={273},
pages={1175–1195},
}
Zhongmin Qian, Hui-Chun Zhang, and Xi-Ping Zhu. Sharp spectral gap and Li–Yau’s estimate on Alexandrov spaces. Vol. 273. In Math. Z. pp.1175–1195. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160910122357767346757.