@inproceedings{p.1886sur,
title={Sur quelques applications de la fonction$Z(x, y, z)$},
author={P. Appell},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108202940290149838},
booktitle={Acta Mathematica},
volume={8},
number={1},
pages={265-294},
year={1886},
}