@misc{Čebyšev_Pafnutij_L'vovič_(1821–1894)_Teoriâ_1849,
 author={Čebyšev, Pafnutij L'vovič (1821–1894)},
 copyright={Public Domain},
 address={Sanktpeterburg},
 address={(Sanktpeterburg)},
 howpublished={online},
 year={1849},
 publisher={[s. n.]},
 publisher={(Tip. Imperatorskoj Akademii Nauk)},
 language={rus},
 title={Teoriâ sravnenij},
 type={Text},
 URL={http://rcin.org.pl/Content/71060/PDF/WA35_6325_5097_Teoria-sravnenij.pdf},
}