1. Ul. ‘Strandja’ 8, Rakovski, Plovdivska, Bulgaria-4150
2. Department of Geology and Environmental Geology, University of Dayton, Dayton, Ohio, USA
3. Department of Palaeontology, Faculty of Mining and Geology, University of Belgrade, Belgrade, Serbia
4. Palaeontological Institute and Museum, University of Zürich, Zürich, Switzerland
5. Geological Survey of Montenegro, Podgorica, Montenegro