@misc{Boratyńska_Krystyna_Systematics_1993,
 author={Boratyńska, Krystyna},
 volume={9},
 editor={Bugała, Władysław. Redaktor},
 editor={Polska Akademia Nauk. Instytut Dendrologii},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 address={Poznań-Kórnik},
 journal={Nasze drzewa leśne},
 howpublished={online},
 year={1993},
 publisher={Sorus},
 language={pol},
 type={Text},
 title={Systematics and geographical distribution},
 URL={http://rcin.org.pl/Content/146131/PDF/KOR001_154146_1993_Systematyka-i-geogra.pdf},
 keywords={Carpinus betulus, hornbeam, systematics of hornbeam, geographical distribution},
}