type: 7_or_203_or_108_or_112collection: 3author: Chytiris, Leonidas_or_Peleka, Effrosyni_or_Paraskevas, MichailsubjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_V. LAW AND SOCIAL SCIENCES_or_III. ENGINEERING AND TECHNOLOGY_or_I. MATHEMATICS AND COMPUTER SCIENCE