author: Pavlakis, Konstantinos_or_Koumpis, Alexandros_or_Manis, Georgios_or_Michelaki, Paraskevi_or_Tzanakis, Georgios_or_Γιαννακούρης, Νικόλαος__elsubjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCESlang: el