type: 104_or_7lang: elcollection: 2author: Pseiridou, Anastasia_or_Makris, Christos_or_Kombiadou, Katerina_or_Paraskevas, Michail_or_Triantafyllou, VasileiossubjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_V. LAW AND SOCIAL SCIENCES