subjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES__enauthor: Vasileiadis, Nikolaos_or_Kranakis, Evangelos_or_Markou, Evripidis_or_Pagourtzis, Aristeidis_or_Stamatis, Dimosthenis_or_Spyropoulos, Vasileioslang: el