type: 108_or_109_or_999_or_7subjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_I. MATHEMATICS AND COMPUTER SCIENCEcollection: 3author: Skianis, Charalampos_or_Koumpis, Alexandros_or_Stratakos, Grigoris_or_Vasileiadis, Ioannis_or_Antoniadis, Ioannis