type: 7author: Pagourtzis, Aristeidis_or_Cheliotis, Dimitrios_or_Giannakopoulos, Panagiotis_or_Mavridis, IoannissubjectTerm: V. LAW AND SOCIAL SCIENCES_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_III. ENGINEERING AND TECHNOLOGY_or_I. MATHEMATICS AND COMPUTER SCIENCE