type: 203_or_1_or_112_or_109_or_104subjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_I. MATHEMATICS AND COMPUTER SCIENCE_or_III. ENGINEERING AND TECHNOLOGY__enauthor: Krestenitis, Ioannis_or_Koumpis, Alexandros_or_Vasileiadis, Nikolaoscollection: 3