@inproceedings{john1969on,
title={On a strong form of spectral synthesis},
author={John E. Gilbert},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203442238776110},
booktitle={Arkiv for Matematik},
volume={7},
number={6},
pages={571-575},
year={1969},
}