1. Faculty of Forestry, Department of Forest Soil, University of Agriculture in Krakow, Kraków, Poland
2. Department of Forest Engineering, Faculty of Forestry, University of Agriculture in Kraków, Kraków, Poland
3. Department of Silviculture, Institute of Forest Ecology and Silviculture, University of Agriculture, Kraków, Poland
4. Technische Universität München, Chair for Forest Growth and Yield Science, Freising, Germany