subjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES__entype: 7author: Papaioannou, Angelos_or_Grontas, Panagiotis_or_Cheliotis, Dimitrios_or_Pagourtzis, Aristeidis_or_Spyropoulos, Vasileioscollection: 2lang: el