@inproceedings{henry1966foundations,
title={Foundations of the theory of Dirichlet series},
author={Henry Helson},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203211264035031},
booktitle={Acta Mathematica},
volume={118},
number={1},
pages={61-77},
year={1966},
}