@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},
 title={Sur les quadratures mécaniques ( Bull. astron., t. 16, 1899, p. 382-387)},
 type={Text},
 URL={http://rcin.org.pl/Content/215138/PDF/WA35_240677_6642-8_Art32.pdf},
}