1. Department of Information and Electrical Engineering and Applied Mathematics, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano (SA), Italy, --- Select a Country ---
2. Department of Mathematics and Physics, University of Campania “L. Vanvitelli”, Viale Abramo Lincoln, 5, 81100 Caserta (CE), Italy, --- Select a Country ---
3. Naval Academy of Livorno, Viale Italia 72, Italy, --- Select a Country ---