1. Department of Geography University of Zurich Zurich Switzerland
2. Department of Forest Ecology The Silva Tarouca Research Institute Brno Czech Republic
3. Department of Forest Botany, Dendrology and Geobiocoenology, Faculty of Forestry and Wood Technology Mendel University in Brno Brno Czech Republic
4. Laboratory of Ion Beam Physics ETH Zürich Zurich Switzerland
5. Department of Paleoecology Institute of Botany of the Czech Academy of Sciences Brno Czech Republic
6. Department of Botany and Zoology, Faculty of Science Masaryk University Brno Czech Republic