@inproceedings{uffe1979simplices,
title={Simplices of maximal volume in hyperbolic$n$-space},
author={Uffe Haagerup, and Hans J. Munkholm},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203254387358297},
booktitle={Acta Mathematica},
volume={147},
number={1},
pages={1-11},
year={1979},
}
Uffe Haagerup, and Hans J. Munkholm. Simplices of maximal volume in hyperbolic$n$-space. 1979. Vol. 147. In Acta Mathematica. pp.1-11. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203254387358297.