@inproceedings{robert1957three-dimensional,
title={Three-dimensional subsonic flows, and asymptotic estimates for elliptic partial differential equations},
author={Robert Finn, and David Gilbarg},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203148291762858},
booktitle={Acta Mathematica},
volume={98},
number={1},
pages={265-296},
year={1957},
}
Robert Finn, and David Gilbarg. Three-dimensional subsonic flows, and asymptotic estimates for elliptic partial differential equations. 1957. Vol. 98. In Acta Mathematica. pp.265-296. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203148291762858.