1. Energy and Environmental Research Laboratory, General (Core) Department, National and Kapodistrian University of Athens, 344 00 Psachna, Evia, Greece
2. Department of Agricultural Development, Agrofood and Management of Natural Resources, National and Kapodistrian University of Athens, 344 00 Psachna, Evia, Greece
3. Department of Port Management and Shipping (PMS) of the School of Economics and Political Science, National and Kapodistrian University of Athens, 344 00 Psachna, Evia, Greece