@inproceedings{rené1939les,
title={Les familles de surfaces de révolution qui possèdent des harmoniques},
author={René Lagrange},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203115078261610},
booktitle={Acta Mathematica},
volume={71},
number={1},
pages={283-315},
year={1939},
}
René Lagrange. Les familles de surfaces de révolution qui possèdent des harmoniques. 1939. Vol. 71. In Acta Mathematica. pp.283-315. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203115078261610.