@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}, }