@inproceedings{po-ning2011evaluating,
title={Evaluating quasilocal energy and solving optimal embedding equation at null infinity},
author={Po-Ning Chen, Mu-Tao Wang, and Shing-Tung Yau},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160820233022601192346},
booktitle={Communications in Mathematical Physics },
volume={308},
number={3},
pages={845-863},
year={2011},
}

Po-Ning Chen, Mu-Tao Wang, and Shing-Tung Yau. Evaluating quasilocal energy and solving optimal embedding equation at null infinity. 2011. Vol. 308. In Communications in Mathematical Physics . pp.845-863. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160820233022601192346.