@misc{Cahen_Eugène_(1865–1941)_Éléments_1900,
 author={Cahen, Eugène (1865–1941)},
 copyright={Public Domain},
 address={Paris},
 howpublished={online},
 year={1900},
 publisher={Gauthier-Villars, Imprimeur-Libraire},
 language={fre},
 title={Éléments de la théorie des nombres : congruences, formes quadratiques, nombres incommensurables, questions diverses},
 type={Text},
 URL={http://rcin.org.pl/Content/71298/PDF/WA35_17808_6298_Elements.pdf},
}