1. Institute of Hydrogeology, Engineering Geology and Applied Geophysics Charles University Prague Czech Republic
2. Institute of Petrology and Structural Geology Charles University Prague Czech Republic
3. Czech Geological Survey Prague Czech Republic
4. Institute of Geology and Palaeontology Charles University Prague Czech Republic
5. School of Earth Sciences Addis Ababa University Addis Ababa Ethiopia
6. Geological Survey of Ethiopia Addis Ababa Ethiopia
7. Institute of Rock Structure and Mechanics Czech Academy of Sciences Prague Czech Republic