subjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES__encollection: 2author: Sakellariou, Ilias_or_Vasileiadis, Nikolaos_or_Palios, Leonidas_or_Cheliotis, Dimitrios_or_Kefalas, Petros_or_Stamatis, Dimosthenislang: el