@misc{Denisiuk_Zygmunt_1998,
 author={Denisiuk, Zygmunt and Kurzyński, Jerzy and Mielnicka, Barbara and Pilipowicz, Włodzimierz},
 editor={Boratyński, Adam. Redaktor},
 editor={Bugała, Władysław. Redaktor},
 editor={Polska Akademia Nauk. Instytut Dendrologii},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 address={Poznań},
 howpublished={online},
 year={1998},
 publisher={Bogucki Wydawnictwo Naukowe},
 language={mul},
 type={Text},
 keywords={Norway spruce, Picea abies, spruce stands protection in Poland},
}