@inproceedings{lars1963supports,
title={Supports and singular supports of convolutions},
author={Lars Hörmander},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203202813079966},
booktitle={Acta Mathematica},
volume={110},
number={1},
pages={279-302},
year={1963},
}