@ARTICLE{Olech_Maria_Contemporary_2011,
 author={Olech, Maria and Węgrzyn, Michał and Lisowska, Maja and Słaby, Agnieszka and Angiel, Piotr},
 number={No 18},
 journal={Papers on Global Change IGBP},
 howpublished={online},
 year={2011},
 publisher={Polish Academy of Sciences},
 title={Contemporary Changes in Vegetation of Polar Regions},
 URL={http://www.journals.pan.pl/Content/98849/PDF/Journal%20102478_volume18_Issue_1_03.pdf},
 doi={10.2478/v10190-010-0003-8},
}