subjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES__enauthor: Spyropoulos, Vasileios_or_Plageras, Panagiotis_or_Kroupis, Christos_or_Grontas, Panagiotis_or_Cheliotis, Dimitrios_or_Pagourtzis, Aristeidislang: el