@inproceedings{s.1986on,
title={On a lattice-point problem in hyperbolic space and related questions in spectral theory},
author={S. J. Patterson},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203526741569485},
booktitle={Arkiv for Matematik},
volume={26},
number={1},
pages={167-172},
year={1986},
}
S. J. Patterson. On a lattice-point problem in hyperbolic space and related questions in spectral theory. 1986. Vol. 26. In Arkiv for Matematik. pp.167-172. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203526741569485.