This author has not been identified. Look up 'Kostis Kyzirakos' in GoogleThis author has not been identified. Look up 'Dimitrianos Savva' in GoogleThis author has not been identified. Look up 'Ioannis Vlachopoulos' in GoogleThis author has not been identified. Look up 'Alexandros Vasileiou' in GoogleThis author has not been identified. Look up 'Nikolaos Karalis' in GoogleThis author has not been identified. Look up 'Manolis Koubarakis' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Stefan Manegold' in Google