@inproceedings{poningquasilocal,
title={Quasilocal energy-momentum at null infinity},
author={PoNing Chen, Mu-Tao Wang, and Shing-Tung Yau},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224205037241591260},
}

PoNing Chen, Mu-Tao Wang, and Shing-Tung Yau. Quasilocal energy-momentum at null infinity. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224205037241591260.