@misc{Pietras_Marcin_2013,
 author={Pietras, Marcin},
 editor={Rudawska, Maria. Promotor},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 address={Kórnik},
 howpublished={online},
 year={2013},
 language={pol},
 type={Text},
 URL={http://www.rcin.org.pl/Content/155033/PDF/KOR001_157032_2013_Struktura-zbiorowisk.pdf},
 keywords={Quercus robur, pedunculate oak, Quercus petraea, sessile oak, ectomycorrhizal fungi, Krotoszyn Forests},
}