@misc{Polak_Paweł_Zmienność_2007,
 author={Polak, Paweł},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 howpublished={online},
 year={2007},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 language={pol},
 title={Zmienność przyrody a ochrona przyrody},
 type={Text},
 URL={http://www.rcin.org.pl/Content/80445/PDF/KR038_98264_r2007_IntegOP-Polak-409-414.pdf},
 keywords={nature - philosophy, nature - philosophical aspect},
}