author: Nagopoulos, Nikolaos_or_Souliou, Theodora_or_Tsotsou, Georgia Eleni_or_Zachos, Efstathios_or_Karkalousos, Petros_or_Ventouras, Errikos-Chaim_or_Spyropoulos, Vasileios_or_Pagourtzis, Aristeidis_or_Λιανός, Θεόδωρος__elsubjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_V. LAW AND SOCIAL SCIENCES