This author has not been identified. It may be one of the following persons: Look up 'Dimitris Mitropoulos' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Vassilios Karakoidas' in GoogleThis author has not been identified. Look up 'Panos Louridas' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Diomidis Spinellis' in Google