collection: 2author: Gitzenis, Savvas_or_Markou, Evripidis_or_Kontogiannis, Ioannis_or_Pagourtzis, Aristeidis_or_Toumpis, StavrossubjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_III. ENGINEERING AND TECHNOLOGY_or_I. MATHEMATICS AND COMPUTER SCIENCEtype: 7lang: el