collection: 2author: Toumpis, Stavros_or_Mavridis, Ioannis_or_Nikolopoulos, Stavros_or_Bratsos, Athanasios_or_Cheliotis, DimitriossubjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_I. MATHEMATICS AND COMPUTER SCIENCE_or_V. LAW AND SOCIAL SCIENCES__en