subjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_I. MATHEMATICS AND COMPUTER SCIENCE_or_V. LAW AND SOCIAL SCIENCES_or_VI. HUMANITIES AND ARTS__enauthor: Kroupis, Christos_or_Karkalousos, Petros_or_Palios, Leonidas_or_Spyropoulos, Vasileios