@misc{Gwiazda_Robert_Studia_2006,
 author={Gwiazda, Robert},
 volume={Nr 51},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 address={Kraków},
 journal={Studia Naturae},
 howpublished={online},
 year={2006},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 language={pol},
 title={Studia Naturae No. 51 (2006)},
 type={Text},
 keywords={artificial reservoirs, water birds},
}