author: Sakellariou, Ilias_or_Giannakouris, Nikolaos_or_Koumpis, Alexandros_or_Stamatis, Dimosthenis_or_������������������������, ����������������__elsubjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_I. MATHEMATICS AND COMPUTER SCIENCEtype: 109lang: el