@inproceedings{t.1928über, title={Über vollstetige lineare Transformationen}, author={T. H. Hildebrandt}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203049505849414}, booktitle={Acta Mathematica}, volume={51}, number={1}, pages={311-318}, year={1928}, }