@inproceedings{ivar1902sur, title={Sur les racines d'une équation fondamentale}, author={Ivar Bendixson}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203009413385091}, booktitle={Acta Mathematica}, volume={25}, number={1}, pages={359-365}, year={1902}, }