@inproceedings{xuhua2007geometry,
title={Geometry of B B-orbit closures in equivariant embeddings},
author={Xuhua He, and Jesper Funch Thomsen},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221112928893619765},
booktitle={Advances in Mathematics},
volume={216},
number={2},
pages={626-646},
year={2007},
}

Xuhua He, and Jesper Funch Thomsen. Geometry of B B-orbit closures in equivariant embeddings. 2007. Vol. 216. In Advances in Mathematics. pp.626-646. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221112928893619765.