@inproceedings{håkan1989closed,
title={Closed ideals in the bidisc algebra},
author={Håkan Hedenmalm},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203531627164528},
booktitle={Arkiv for Matematik},
volume={28},
number={1},
pages={111-117},
year={1989},
}