type: 7author: Tsotsou, Georgia Eleni_or_Kroupis, Christos_or_Ventouras, Errikos-Chaim_or_Spyropoulos, Vasileios_or_Pagourtzis, Aristeidis_or_Λιανός, Θεόδωρος__elsubjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_V. LAW AND SOCIAL SCIENCES