6Philippe Martin and Peter W. Eldund. Knowledge Retrieval and the World Wide Web. IEEE Intelligent Systems,2000.
7F. Wiesman, Arie Hasman, H.j. van den Herik. Infommtion retrieval: an overview of systexn characteristics. International Journal of Medical Informtics. 1997.
8Guarino N, Masolo C, Vetere G. OntoSeek : Content Based Access to the Web. IEEE Intelligent Systems, 1999 ; (3).
9Gurber T R. Translation Approach to Portable Ontology Specifications. Knowledge Acquisition,1993;(2).
