@misc{Tworek_Stanisław_Breeding_2001,
 author={Tworek, Stanisław},
 volume={Vol. 58},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 journal={Nature Conservation},
 howpublished={online},
 year={2001},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 language={eng},
 title={Breeding bird communities in relation to different habitat islands},
 type={Text},
 URL={http://rcin.org.pl/Content/183512/PDF/KR038_113958_r2001-t58_NC-Tworek-83-93.pdf},
 keywords={Jura Landscape Park System},
}