subjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES__enauthor: Spyropoulos, Vasileios_or_Ntziachristos, Leonidas_or_Slini, Theodora_or_Cheliotis, Dimitrios_or_Nikolopoulos, Stavros_or_Mousiopoulos, Nikolaoslang: el