subjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_III. ENGINEERING AND TECHNOLOGY_or_VI. HUMANITIES AND ARTS__enauthor: Spyropoulos, Vasileios_or_Achilias, Dimitris_or_Eleftheriadis, Ioannis_or_Zachos, Efstathios