datepublished: 2015author: Meletiou Christou, Maria Sonia_or_Karkalousos, Petros_or_Spyropoulos, Vasileios_or_Σπυρόπουλος, Βασίλειος__ellang: eltype: 1collection: 1subjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_IV. MEDICINE AND HEALTH SCIENCES, LIFE SCIENCES, BIOLOGICAL SCIENCES