@inproceedings{xuhua2009g-stable,
title={G-stable pieces and partial flag varieties},
author={Xuhua He},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221113000832900773},
booktitle={Representation Theory, Contemp. Math},
volume={478},
pages={61-70},
year={2009},
}