subjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_VI. HUMANITIES AND ARTS__enauthor: Spyropoulos, Vasileios_or_Bratsos, Athanasios_or_Cheliotis, Dimitrios_or_Markou, Evripidis_or_Patsourakos, Spyros