Institute of Geology and Mineral Exploration, Division of General Geology & Geological Mapping, 1 Spirou Loui str., Olympic Village, Entrance C, 136 77 Acharnae, Greece
Faculty of Geology and Geography, Department of Mineralogy, Petrology and Economic Geology, Sofia University “St Kliment Ohridski”, 15 Tsar Osvoboditel Blvd, 1504 Sofia