author: Toumpis, Stavros_or_Gitzenis, Savvas_or_Michelaki, Paraskevi_or_Pavlakis, Konstantinos_or_Perivolaropoulos, Leandros_or_Περιβολαρόπουλος, Λέανδρος__elsubjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCESlang: el