@misc{Čebyšev_Pafnutij_L'vovič_(1821–1894)_Teoriâ_1879,
 author={Čebyšev, Pafnutij L'vovič (1821–1894)},
 copyright={Public Domain},
 address={Sanktpeterburg},
 howpublished={online},
 year={1879},
 publisher={[s.n.]},
 publisher={Tipogr. Tovariŝestva "Obŝestvennaâ Pol'za"},
 language={rus},
 title={Teoriâ sravnenij},
 type={Text},
 URL={http://www.rcin.org.pl/Content/70181/PDF/WA35_13867_5098_Teoria-sravnenij.pdf},
}