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Alexander M. Goulielmos
Former Professor of Marine Economics, University of Piraeus, Department of Maritime Studies; 80, Karaoli and Dimitriou St., Piraeus, 18534, Greece.
Giannis Sitzimis
b PhD in Maritime Studies, University of Piraeus, Department of Maritime Studies, 80, Karaoli and Dimitriou St., Piraeus, 18534, Greece.