@inproceedings{ren2009rigidity,
title={Rigidity of polyhedral surfaces, II},
author={Ren Guo, and Feng Luo},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224205809820791348},
booktitle={Geometry & Topology},
volume={13},
number={3},
pages={1265-1312},
year={2009},
}