@misc{Lagrange_Charles_Henri_(1851–1932)_Démonstration_1884,
 author={Lagrange, Charles Henri (1851–1932)},
 copyright={Public Domain},
 address={Bruxelles},
 howpublished={online},
 year={1884},
 publisher={F. Hayez},
 language={fre},
 type={Text},
 title={Démonstration élémentaire de la loi suprême de Wronski},
 URL={http://rcin.org.pl/Content/105276/PDF/WA35_15074_7568_Demonstration.pdf},
}