@inproceedings{jean1981on,
title={On the spectral synthesis problem for points in the dual of a nilpotent Lie group},
author={Jean Ludwig},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203514837638388},
booktitle={Arkiv for Matematik},
volume={21},
number={1},
pages={127-144},
year={1981},
}
Jean Ludwig. On the spectral synthesis problem for points in the dual of a nilpotent Lie group. 1981. Vol. 21. In Arkiv for Matematik. pp.127-144. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203514837638388.