@inproceedings{børge1951harald,
title={Harald Bohr},
author={Børge Jessen},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203131859417735},
booktitle={Acta Mathematica},
volume={86},
number={1},
pages={i-xxiii},
year={1951},
}