1. Faculty of Civil Engineering and Architecture, Osijek, J.J. Strossmayer University in Osijek, Department of Materials and Structures, 31 000 Osijek, Croatia
2. Faculty of Agrobiotechnical Science, Osijek J.J. Strossmayer University in Osijek, Department of Agricultural Technics, 31 000 Osijek, Croatia
3. Faculty of Humanities and Social Sciences, Osijek, J.J. Strossmayer University in Osijek, 31 000 Osijek, Croatia