@misc{Broniewska_Katarzyna_Corylus_2006-2019,
 author={Broniewska, Katarzyna and Jędrowiak, Anna and Nowak, Kinga},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 howpublished={online},
 year={2006-2019},
 language={mul},
 title={Corylus avellana L.},
}