This author has not been identified. Look up 'Paraskevas Koukaras' in GoogleThis author has not been identified. Look up 'Napoleon Bezas' in GoogleThis author has not been identified. Look up 'Paschalis Gkaidatzis' in GoogleThis author has not been identified. Look up 'Dimosthenis Ioannidis' in GoogleThis author has not been identified. Look up 'Dimitrios Tzovaras' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Christos Tjortjis' in Google