author: Fylaktakidou, Konstantina_or_Nikolioudakis, Nikolaos_or_Kokkorogiannis, Theodoros_or_Giannakouris, Nikolaos_or_Toumpis, Stavros_or_Toumpis, Stavros__ensubjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCESlang: el