subjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES__enauthor: Zachos, Efstathios_or_Toumpis, Stavros_or_Mavridis, Ioannis_or_Nikolopoulos%2C Stavros_or_Stamatis%2C Dimosthenis_or_Spyropoulos%2C Vasileioslang: el