1. University of Western Macedonia,Department of Mechanical Engineering,Kozani,Greece
2. Aristotle University of Thessaloniki,Laboratory of Nonlinear Systems - Circuits & Complexity,Physics Department,Thessaloniki,Greece
3. Hellenic Military Academy,Department of Computer Engineering,Vari,Greece
4. Silesian University of Technology,Faculty of Applied Mathematics,Department of Mathematics Applications and Methods for Artificial Intelligence,Gliwice,Poland,44-100