@misc{Czortek_Patryk_Encroachment,
 author={Czortek, Patryk},
 howpublished={online},
 publisher={Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej},
 language={pol ; eng},
 type={artykuł},
 title={Encroachment of thermophilous species on the transformed habitats (sand and gravel pits) near Świecie on the Vistula},
 keywords={thermophilous species, sand pit, gravel pits, artificial habitat, secondary succession, Świecie n. Wisłą, anthropopressure},
}