@inproceedings{j.1954on,
title={On a class of normed rings},
author={J. Wermer},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203417639295898},
booktitle={Arkiv for Matematik},
volume={2},
number={6},
pages={537-551},
year={1954},
}