@inproceedings{arthur2010on,
title={ON HYPERBOLIC GROUPS WITH SPHERES AS BOUNDARY},
author={Arthur Bartels, Wolfgang Luck, and Shmuel Weinberger},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160911223738166610848},
booktitle={Journal of Differential Geometry},
volume={86},
number={1},
pages={1-16},
year={2010},
}
Arthur Bartels, Wolfgang Luck, and Shmuel Weinberger. ON HYPERBOLIC GROUPS WITH SPHERES AS BOUNDARY. 2010. Vol. 86. In Journal of Differential Geometry. pp.1-16. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160911223738166610848.