@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 figure de la Terre ( Bull. astron., t. 6, 1889, p. 5-11)},
 URL={http://rcin.org.pl/impan/Content/213837/PDF/WA35_240641_6642-8_Art14.pdf},
}