@inproceedings{ivar1883quelques,
title={Quelques theorèmes},
author={IVar Bendixson},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108202930099025747},
booktitle={Acta Mathematica},
volume={2},
number={1},
pages={415-429},
year={1883},
}