@inproceedings{bo1957a,
title={A note on a problem of boas},
author={Bo Kjellberg},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203421085583927},
booktitle={Arkiv for Matematik},
volume={3},
number={4},
pages={295-299},
year={1957},
}