This author has not been identified. Look up 'Eleni Christopoulou' in GoogleThis author has not been identified. Look up 'John D. Garofalakis' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Christos Makris' in GoogleThis author has not been identified. Look up 'Yannis Panagis' in GoogleThis author has not been identified. Look up 'Athanasios Psaras-Chatzigeorgiou' in GoogleThis author has not been identified. Look up 'Evangelos Sakkopoulos' in GoogleThis author has not been identified. Look up 'Athanasios K. Tsakalidis' in Google