collection: 2type: 7author: Tigkas, Stylianos_or_Andrikopoulos, Nikolaos_or_Lachana, Alexandra_or_Nakos, Georgios_or_Papathanasiou, Athanasios_or_Karachaliou, Angeliki_or_Pagourtzis, Aristeidis_or_����������������������, ������������������__elsubjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_IV. MEDICINE AND HEALTH SCIENCES, LIFE SCIENCES, BIOLOGICAL SCIENCES