subjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCESauthor: Gitzenis, Savvas_or_Koumpis, Alexandros_or_Fylaktakidou, Konstantina_or_Michelaki, Paraskevi_or_Tzanakis, Georgios_or_Pavlakis, Konstantinos__enlang: el