@inproceedings{mu-tao2009quasilocal,
title={Quasilocal mass in general relativity},
author={Mu-Tao Wang, and Shing-Tung Yau},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160821153435152749361},
booktitle={Physical Review Letters},
volume={102},
number={2},
pages={021101},
year={2009},
}
Mu-Tao Wang, and Shing-Tung Yau. Quasilocal mass in general relativity. 2009. Vol. 102. In Physical Review Letters. pp.021101. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160821153435152749361.