type: 7author: Lekka, Maria Eleni E_or_Leondaritis, George_or_Zoi, Georgiou_or_Nakos, Georgios_or_Stamati, Vasiliki_or_Plageras, Panagiotis_or_Souliou, Theodora_or_Lianos, Theodoros_or_Pagourtzis, Aristeidis_or_Spyropoulos, Vasileios__ensubjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_VI. HUMANITIES AND ARTS