1. Technical University in Zvolen , Faculty of Forestry , T. G. Masaryka 24, SK – 960 01 Zvolen, Slovak Republic
2. Czech University of Life Sciences Prague , Faculty of Forestry and Wood Sciences , Kamýcká 129, CZ – 165 00 Praha - Suchdol 6, Czech Republic
3. Slovak Academy of Sciences, Institute of Landscape Ecology , SK – 949 01 Nitra, Slovak Republic