1. Department of Computer Science, Modeling, Electronics and Systems Engineering, University of Calabria , Rende, Italy.
2. Department of Physics, Sapienza University of Rome , Rome, Italy.
3. Department of Computer, Control, and Management Engineering ‘Antonio Ruberti’, Sapienza University of Rome , Rome, Italy.
4. Institute of Information Technologies and Telecommunications, North Caucasus Federal University , Stavropol, Russian Federation.