@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},
}