1. Department of Industrial and Information Engineering and Economics, University of L’Aquila, Poggio Roio, 67100 L’Aquila, Italy
2. Department of Industrial Engineering, Tor Vergata University of Rome, Via del Politecnico 1, 00133 Rome, Italy
3. Department of Astronautics, Electrical and Energetics Engineering, Sapienza University of Rome, Via Eudossiana 18, 00185 Rome, Italy