1. Department of Physics, School of Science, Kavala’s Campus, International Hellenic University (IHU), GR-57001 Thessaloniki, Greece
2. Department of Library Science, Archives and Information Systems, School of Social Sciences, Alexander’s Campus, International Hellenic University (IHU), GR-57400 Thessaloniki, Greece
3. Department of Information and Electronic Engineering, Alexander’s Campus, International Hellenic University (IHU), GR-57400 Thessaloniki, Greece
4. Inter-Faculty Master Program on Networks and Complexity, Aristotle University of Thessaloniki (AUTH), GR-54124 Thessaloniki, Greece