@inproceedings{p.1882sur,
title={Sur les fonctions uniformes d'un point analytique ($x, y$)},
author={P. Appell},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108202926630272716},
booktitle={Acta Mathematica},
volume={1},
number={1},
pages={109-131},
year={1882},
}