@misc{Poincaré_Henri_(1854–1912)_Développement_1952,
 author={Poincaré, Henri (1854–1912) and Sémirot, Pierre.},
 address={Paris},
 howpublished={online},
 year={1952},
 publisher={Gauthier-Villars},
 language={fre},
 type={Text},
 title={Développement de la fonction perturbatrice ( Bull. astron., t. 15, 1898, p. 70-71)},
 URL={http://rcin.org.pl/Content/213284/PDF/WA35_240632_6642-8_Art5.pdf},
}