@inproceedings{f.1991on,
title={On Hille-Tamarkin operators and Schatten classes},
author={F. Cobos, and T. Kühn},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203537735247578},
booktitle={Arkiv for Matematik},
volume={30},
number={1},
pages={217-220},
year={1991},
}