@inproceedings{seiji2006convergence,
title={Convergence rate to stationary solutions for Boltzmann equation with external force},
author={Seiji Ukai, Tong Yang, and Huijiang Zhao},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224210953173926532},
booktitle={Chinese Annals of Mathematics, Series B},
volume={27},
number={4},
pages={363-378},
year={2006},
}

Seiji Ukai, Tong Yang, and Huijiang Zhao. Convergence rate to stationary solutions for Boltzmann equation with external force. 2006. Vol. 27. In Chinese Annals of Mathematics, Series B. pp.363-378. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224210953173926532.