@inproceedings{xuhuaa,
title={A generalization of Steinbergs cross section},
author={Xuhua He, and George Lusztig},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221112917138834761},
booktitle={Journal of the American Mathematical Society},
volume={25},
number={3},
pages={739-757},
}

Xuhua He, and George Lusztig. A generalization of Steinbergs cross section. Vol. 25. In Journal of the American Mathematical Society. pp.739-757. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221112917138834761.