@inproceedings{ccm2004positivity,
title={Positivity of quasilocal mass-Reply},
author={CCM Liu, and Shing-Tung Yau},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224205226882217286},
volume={92},
number={25},
year={2004},
}