@inproceedings{k.1895über,
title={Über die Steinersche Fläche},
author={K. Th. Vahlen},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108202959643049012},
booktitle={Acta Mathematica},
volume={19},
number={1},
pages={199-200},
year={1895},
}