lang: elcollection: 3type: 7_or_1_or_999_or_108_or_112subjectTerm: V. LAW AND SOCIAL SCIENCES_or_I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCESauthor: Chytiris, Leonidas_or_Toumpis, Stavros_or_Tsitsifli, Stavroula