@misc{Natanson_Ludwik_(1822–1896)_Teorya_1883,
 author={Natanson, Ludwik (1822–1896)},
 copyright={Public Domain},
 address={Warszawa},
 address={(Warszawa)},
 howpublished={online},
 year={1883},
 publisher={[s.n.]},
 publisher={(Drukarnia J. Bergera)},
 language={pol},
 title={Teorya jestestw idiodynamicznych},
 type={Text},
 URL={http://www.rcin.org.pl/Content/1758/PDF/WA35_3588_4537_Teorya-jestestw.pdf},
}