@inproceedings{mu-taoquasi-local,
title={Quasi-local mass at the null infinity of the Vaidya spacetime},
author={Mu-Tao Wang, Po-Ning Chen, and Shing-Tung Yau},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20180430141608879182079},
booktitle={Harv. Univ. Cent. Math. Sci. Appl. Ser. Math.},
volume={1},
pages={33-48},
}

Mu-Tao Wang, Po-Ning Chen, and Shing-Tung Yau. Quasi-local mass at the null infinity of the Vaidya spacetime. Vol. 1. In Harv. Univ. Cent. Math. Sci. Appl. Ser. Math.. pp.33-48. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20180430141608879182079.