@inproceedings{,
title={Fac-similé d’une lettre d’Abel},
author={},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203014667646138},
booktitle={Acta Mathematica},
volume={27},
number={1},
pages={391-391},
year={1903},
}