@inproceedings{elias1958localization, title={Localization and summability of multiple fourier series}, author={Elias M. Stein}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203149020020864}, booktitle={Acta Mathematica}, volume={100}, number={1}, pages={93-147}, year={1958}, }