Authors
Łukasz Tyburski
ltyburski@kampinoski-pn.gov.pl
Kampinos National Park, Department of Science and Nature Monitoring, Tetmajera,, Izabelin, Poland
Paweł Przybylski
Forest Research Institute, Department of Silviculture and Genetics of Forest Trees, Braci Leśnej, Sękocin Stary,, Raszyn, Poland