@inproceedings{k.1895über,
title={Über reductible Binome},
author={K. Th. Vahlen},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108202959546303011},
booktitle={Acta Mathematica},
volume={19},
number={1},
pages={195-198},
year={1895},
}