@misc{Maciejewski_Zbigniew_Spontaneous_2008,
 author={Maciejewski, Zbigniew},
 volume={Nr 54 cz. II},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 journal={Studia Naturae},
 howpublished={online},
 year={2008},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 language={pol},
 type={Text},
 title={Spontaneous changes of natural forests composition in strictly protected areas of the Roztocze National Park},
 URL={http://rcin.org.pl/iop/Content/120337/PDF/KR038_94835_r2008-t54-2_SN-Maciejewski-157-173.pdf},
 keywords={protected natural areas, Roztocze National Park, natural forests},
}