@misc{Żurek_Roman_Lakes_2009,
 author={Żurek, Roman},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 howpublished={online},
 year={2009},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 language={eng},
 title={Lakes in sulphur open pits},
 type={Text},
 URL={http://rcin.org.pl/Content/213909/PDF/KR038_158930_r2009_Lakes-Zurek-s50.pdf},
}