@inproceedings{lars1960estimates,
title={Estimates for translation invariant operators in$L$^{p}spaces},
author={Lars Hörmander},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203155029250908},
booktitle={Acta Mathematica},
volume={104},
number={1},
pages={93-140},
year={1960},
}