@inproceedings{matts1985sharp,
title={Sharp estimates of uniform harmonic majorants in the plane},
author={Matts Essén},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203523216783455},
booktitle={Arkiv for Matematik},
volume={25},
number={1},
pages={15-28},
year={1985},
}