@inproceedings{richard1982corrections,
title={Corrections to compact group actions and the topology of manifolds with non-positive curvature},
author={Richard Schoen, and Shing-Tung Yau},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224205136375699274},
booktitle={Topology},
volume={21},
number={4},
pages={483},
year={1982},
}

Richard Schoen, and Shing-Tung Yau. Corrections to compact group actions and the topology of manifolds with non-positive curvature. 1982. Vol. 21. In Topology. pp.483. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224205136375699274.