@inproceedings{t.1920sur,
title={Sur la régularisation du problème des trois corps},
author={T. Levi-Civita},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203034427286295},
booktitle={Acta Mathematica},
volume={42},
number={1},
pages={99-144},
year={1920},
}