@inproceedings{xuhua2007minimal,
title={Minimal length elements in some double cosets of Coxeter groups},
author={Xuhua He},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221112857439450755},
booktitle={Advances in Mathematics},
volume={215},
number={2},
pages={469-503},
year={2007},
}

Xuhua He. Minimal length elements in some double cosets of Coxeter groups. 2007. Vol. 215. In Advances in Mathematics. pp.469-503. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221112857439450755.