author: Tzanakis, Georgios_or_Bertachas, Ioannis_or_Toumpis, Stavros_or_Michelaki, Paraskevi_or_Perivolaropoulos, Leandros_or_Γιαννακούρης, Νικόλαος__elsubjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCESlang: el