@inproceedings{f.1883ableitung,
title={Ableitung},
author={F. Prym},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108202931510148760},
booktitle={Acta Mathematica},
volume={3},
number={1},
pages={216-239},
year={1883},
}