subjectTerm: I. MATHEMATICS AND COMPUTER SCIENCEauthor: Bratsos, Athanasios_or_Toumpis, Stavros_or_Zachos%2C Efstathios_or_Pagourtzis%2C Aristeidis_or_%CE%9B%CE%B9%CE%B1%CE%BD%CF%8C%CF%82%2C %CE%98%CE%B5%CF%8C%CE%B4%CF%89%CF%81%CE%BF%CF%82__ellang: el