@misc{Jelonek_Marek_Ichtiofauna_2006,
 author={Jelonek, Marek and Żurek, Roman. Redaktor},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 howpublished={online},
 year={2006},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 language={pol},
 title={Ichtiofauna rzeki Wisły i wybranych dopływów - struktura gatunkowa},
 title={Ichthyofauna of the Vistula River - species structure},
 type={Text},
 URL={http://rcin.org.pl/Content/151859/PDF/KR038_181708_r2006_Ichtiof-Jelonek-57-78.pdf},
 keywords={ichthyofauna, freshwater biology, hydrology},
}