Μεταδιδακτορικη έρευνα, 6 μήνες, (2004),University of East London, London, UK., School of Computing And Technology
Μεταδιδακτορικη έρευνα, 15 ημερες, (2013),University of Napoli Parthenope, Napoli, Italy, School of law and economics
Μεταδιδακτορικη έρευνα, 15 hmerew, (2015),University of basilicata, Potenza, Italy, School of Mathematics, Computing and Environment
