@misc{Boratyńska_Krystyna_Systematics_1990,
 author={Boratyńska, Krystyna},
 volume={18},
 editor={Białobok, Stefan. Redaktor},
 editor={Polska Akademia Nauk. Instytut Dendrologii},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 address={Poznań},
 journal={Nasze drzewa leśne},
 howpublished={online},
 year={1990},
 publisher={Wydawnictwo Arkadia},
 language={mul},
 type={Text},
 title={Systematics and geographical distribution},
 URL={http://www.rcin.org.pl/Content/146729/PDF/KOR001_155431_1990_Systematyka-i-geogra.pdf},
 keywords={wild fruit trees, Cerasus avium, Pyrus communis, Malus sylvestris, systematics, geographical distribution},
}