@inproceedings{seiji2004nonlinear,
title={Nonlinear stability of boundary layers of the Boltzmann equation, I. The case M< 1},
author={Seiji Ukai, Tong Yang, and Shih-Hsien Yu},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224210904798950519},
booktitle={Communications in mathematical physics},
volume={244},
number={1},
pages={99-109},
year={2004},
}

Seiji Ukai, Tong Yang, and Shih-Hsien Yu. Nonlinear stability of boundary layers of the Boltzmann equation, I. The case M< 1. 2004. Vol. 244. In Communications in mathematical physics. pp.99-109. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224210904798950519.