1. Aristotle University of Thessaloniki,Laboratory of Nonlinear Systems - Circuits & Complexity,Physics Department,Thessaloniki,Greece
2. Silesian University of Technology,Faculty of Applied Mathematics,Department of Mathematics Applications and Methods for Artifiial Intelligence,Gliwice,Poland,44-100
3. University of Aberdeen,Institute for Complex Systems and Mathematical Biology, SUPA,Aberdeen,UK,AB24 3UX
4. Aristotle University of Thessaloniki,Physics Department,Thessaloniki,Greece,54124