1. BISITE Research Group, University of Salamanca, 37007 Salamanca, Spain
2. Department of Mechanical, Energy and Management Engineering, University of Calabria, 87036 Cosenza, Italy
3. Department of Biology, Ecology and Earth Sciences, University of Calabria, 87036 Cosenza, Italy
4. Department of Geology, University of Patras, 26504 Patras, Greece
5. Faculty of Electrical Engineering and Computing, University of Zagreb, 10000 Zagreb, Croatia