@inproceedings{n.1971singular,
title={Singular integrals and multiplier operators},
author={N. M. Rivière},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203447888750158},
booktitle={Arkiv for Matematik},
volume={9},
number={1},
pages={243-278},
year={1971},
}