Authors
Andrzej Szczepkowski
andrzej_szczepkowski@sggw.edu.pl
Warsaw University of Life Sciences – SGGW, Institute of Forest Sciences, Department of Forest Protection, Warsaw, Poland
Łukasz Tyburski
Izabelin, Poland
Małgorzata Sułkowska
Forest Research Institute, Department of Silviculture and Forest Tree Genetics, Raszyn, Poland