1. University of Sassari, Gran Sasso Science Institute and CRENoS, Sassari, L’Aquila, Sassari, Italy
2. Florida Atlantic University, Boca Raton, USA
3. University of Sassari and University of Corsica, Sassari, Corte , Italy, France
4. University of Corsica and CRENoS, Corte, Sassari, France, Italy
5. Columbus State University, Columbus, USA