@inproceedings{a.1958espaces,
title={Espaces de dirichlet},
author={A. Beurling, and J. Deny},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203150516044876},
booktitle={Acta Mathematica},
volume={99},
number={1},
pages={203-224},
year={1958},
}