Authors
Oleh Hnatiuk
National Forestry University of Ukraine, Educational and Research Institute of Forestry and Park Gardening, Lviv, Ukraine
Vasyl Mohytych
Forest Research Institute, Department of Silviculture and Genetics of Forest Trees, Raszyn, Poland
Małgorzata Sułkowska
Forest Research Institute, Department of Silviculture and Genetics of Forest Trees, Raszyn, Poland