@misc{Piotrowska_Małgorzata_The_1989,
 author={Piotrowska, Małgorzata and Wesołowski, Tomasz (1950– )},
 volume={25},
 editor={Polska Akademia Nauk. Instytut Zoologii},
 number={1},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 journal={Acta Ornithologica},
 howpublished={online},
 year={1989},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={eng},
 language={rus},
 language={pol},
 type={Text},
 title={The breeding ecology and behaviour of the chiffchaff Phylloscopus collybita in primaeval and managed stands of Białowieża forest (Poland)},
 URL={http://www.rcin.org.pl/Content/42129/PDF/WA058_59168_P257-T25_Acta-Ornith-Nr-1-2.pdf},
 keywords={Chiffchaff, breeding biology, ecology, Poland, Białowieża Forest, birds, Phylloscopus collybita, Sylviidae, Aves},
}