@misc{Zieliński_Jerzy_Crataegus_1977,
 author={Zieliński, Jerzy},
 volume={22},
 editor={Polska Akademia Nauk. Instytut Dendrologii},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 address={Poznań ; Warszawa},
 journal={Arboretum Kórnickie},
 howpublished={online},
 year={1977},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={mul},
 title={Crataegus curvisepala Lindman and C. microphylla C. Koch in Bulgaria},
 title={Crataegus curvisepala Lindman and C. microphylla C. Koch in Bulgaria},
 type={Text},
 URL={http://www.rcin.org.pl/Content/142441/PDF/KOR001_147184.pdf},
 keywords={Crategus curvisepala, Crategus microphylla, occurence in Bulgaria},
}