Fotis Kokkoras Demetrios G. Sampson Ioannis P. Vlahavas A Knowledge Based Approach on Educational Metadata Use. 201-216 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2563&spage=201 2001 conf/pci/2001 Panhellenic Conference on Informatics db/conf/pci/pci2001.html#KokkorasSV01