@inproceedings{e.1911über,
title={Über Pfaffsche Aggregate},
author={E. Netto},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203023932066212},
booktitle={Acta Mathematica},
volume={34},
number={1},
pages={285-292},
year={1911},
}