@misc{Poincaré_Henri_(1854–1912)_Sur_1952,
 author={Poincaré, Henri (1854–1912) and Sémirot, Pierre.},
 address={Paris},
 howpublished={online},
 year={1952},
 publisher={Gauthier-Villars},
 language={fre},
 type={Text},
 title={Sur la détermination des orbites par la méthode de Laplace ( Bull. astron., t. 23, 1906, p. 161-187)},
 URL={http://rcin.org.pl/impan/Content/214268/PDF/WA35_240670_6642-8_Art27.pdf},
}