collection: 3lang: elauthor: Krestenitis, Ioannis_or_Koutitas, Christoforos_or_Karampas, Theofanis_or_Paraskevas, Michail_or_Triantafyllou, Vasileios_or_Chytiris, LeonidassubjectTerm: II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_V. LAW AND SOCIAL SCIENCES