subjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_III. ENGINEERING AND TECHNOLOGY_or_VI. HUMANITIES AND ARTS__enauthor: Grontas, Panagiotis_or_Karkalousos, Petros_or_Spyropoulos, Vasileios_or_Galiatsatos, Aristeidis_or_Pagourtzis, Aristeidis_or_Spyrou, Konstantinos