@inproceedings{harald1952on,
title={On approximation of continuous and of analytic functions},
author={Harald Bohman},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203414226437873},
booktitle={Arkiv for Matematik},
volume={2},
number={1},
pages={43-56},
year={1952},
}